Obj-C SDK Cleanup

This CL separates the files under sdk/objc into logical directories, replacing
the previous file layout under Framework/.

A long term goal is to have some system set up to generate the files under
sdk/objc/api (the PeerConnection API wrappers) from the C++ code. In the shorter
term the goal is to abstract out shared concepts from these classes in order to
make them as uniform as possible.

The separation into base/, components/, and helpers/ are to differentiate between
the base layer's common protocols, various utilities and the actual platform
specific components.

The old directory layout that resembled a framework's internal layout is not
necessary, since it is generated by the framework target when building it.

Bug: webrtc:9627
Change-Id: Ib084fd83f050ae980649ca99e841f4fb0580bd8f
Reviewed-on: https://webrtc-review.googlesource.com/94142
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24493}
diff --git a/sdk/objc/unittests/RTCIceServerTest.mm b/sdk/objc/unittests/RTCIceServerTest.mm
new file mode 100644
index 0000000..8ef5195
--- /dev/null
+++ b/sdk/objc/unittests/RTCIceServerTest.mm
@@ -0,0 +1,171 @@
+/*
+ *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#import <Foundation/Foundation.h>
+
+#include <vector>
+
+#include "rtc_base/gunit.h"
+
+#import "api/peerconnection/RTCIceServer+Private.h"
+#import "api/peerconnection/RTCIceServer.h"
+#import "helpers/NSString+StdString.h"
+
+@interface RTCIceServerTest : NSObject
+- (void)testOneURLServer;
+- (void)testTwoURLServer;
+- (void)testPasswordCredential;
+- (void)testInitFromNativeServer;
+@end
+
+@implementation RTCIceServerTest
+
+- (void)testOneURLServer {
+  RTCIceServer *server = [[RTCIceServer alloc] initWithURLStrings:@[
+      @"stun:stun1.example.net" ]];
+
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(1u, iceStruct.urls.size());
+  EXPECT_EQ("stun:stun1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("", iceStruct.username);
+  EXPECT_EQ("", iceStruct.password);
+}
+
+- (void)testTwoURLServer {
+  RTCIceServer *server = [[RTCIceServer alloc] initWithURLStrings:@[
+      @"turn1:turn1.example.net", @"turn2:turn2.example.net" ]];
+
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(2u, iceStruct.urls.size());
+  EXPECT_EQ("turn1:turn1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("turn2:turn2.example.net", iceStruct.urls.back());
+  EXPECT_EQ("", iceStruct.username);
+  EXPECT_EQ("", iceStruct.password);
+}
+
+- (void)testPasswordCredential {
+  RTCIceServer *server = [[RTCIceServer alloc]
+      initWithURLStrings:@[ @"turn1:turn1.example.net" ]
+                username:@"username"
+              credential:@"credential"];
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(1u, iceStruct.urls.size());
+  EXPECT_EQ("turn1:turn1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("username", iceStruct.username);
+  EXPECT_EQ("credential", iceStruct.password);
+}
+
+- (void)testHostname {
+  RTCIceServer *server = [[RTCIceServer alloc] initWithURLStrings:@[ @"turn1:turn1.example.net" ]
+                                                         username:@"username"
+                                                       credential:@"credential"
+                                                    tlsCertPolicy:RTCTlsCertPolicySecure
+                                                         hostname:@"hostname"];
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(1u, iceStruct.urls.size());
+  EXPECT_EQ("turn1:turn1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("username", iceStruct.username);
+  EXPECT_EQ("credential", iceStruct.password);
+  EXPECT_EQ("hostname", iceStruct.hostname);
+}
+
+- (void)testTlsAlpnProtocols {
+  RTCIceServer *server = [[RTCIceServer alloc] initWithURLStrings:@[ @"turn1:turn1.example.net" ]
+                                                         username:@"username"
+                                                       credential:@"credential"
+                                                    tlsCertPolicy:RTCTlsCertPolicySecure
+                                                         hostname:@"hostname"
+                                                 tlsAlpnProtocols:@[ @"proto1", @"proto2" ]];
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(1u, iceStruct.urls.size());
+  EXPECT_EQ("turn1:turn1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("username", iceStruct.username);
+  EXPECT_EQ("credential", iceStruct.password);
+  EXPECT_EQ("hostname", iceStruct.hostname);
+  EXPECT_EQ(2u, iceStruct.tls_alpn_protocols.size());
+}
+
+- (void)testTlsEllipticCurves {
+  RTCIceServer *server = [[RTCIceServer alloc] initWithURLStrings:@[ @"turn1:turn1.example.net" ]
+                                                         username:@"username"
+                                                       credential:@"credential"
+                                                    tlsCertPolicy:RTCTlsCertPolicySecure
+                                                         hostname:@"hostname"
+                                                 tlsAlpnProtocols:@[ @"proto1", @"proto2" ]
+                                                tlsEllipticCurves:@[ @"curve1", @"curve2" ]];
+  webrtc::PeerConnectionInterface::IceServer iceStruct = server.nativeServer;
+  EXPECT_EQ(1u, iceStruct.urls.size());
+  EXPECT_EQ("turn1:turn1.example.net", iceStruct.urls.front());
+  EXPECT_EQ("username", iceStruct.username);
+  EXPECT_EQ("credential", iceStruct.password);
+  EXPECT_EQ("hostname", iceStruct.hostname);
+  EXPECT_EQ(2u, iceStruct.tls_alpn_protocols.size());
+  EXPECT_EQ(2u, iceStruct.tls_elliptic_curves.size());
+}
+
+- (void)testInitFromNativeServer {
+  webrtc::PeerConnectionInterface::IceServer nativeServer;
+  nativeServer.username = "username";
+  nativeServer.password = "password";
+  nativeServer.urls.push_back("stun:stun.example.net");
+  nativeServer.hostname = "hostname";
+  nativeServer.tls_alpn_protocols.push_back("proto1");
+  nativeServer.tls_alpn_protocols.push_back("proto2");
+  nativeServer.tls_elliptic_curves.push_back("curve1");
+  nativeServer.tls_elliptic_curves.push_back("curve2");
+
+  RTCIceServer *iceServer =
+      [[RTCIceServer alloc] initWithNativeServer:nativeServer];
+  EXPECT_EQ(1u, iceServer.urlStrings.count);
+  EXPECT_EQ("stun:stun.example.net",
+      [NSString stdStringForString:iceServer.urlStrings.firstObject]);
+  EXPECT_EQ("username", [NSString stdStringForString:iceServer.username]);
+  EXPECT_EQ("password", [NSString stdStringForString:iceServer.credential]);
+  EXPECT_EQ("hostname", [NSString stdStringForString:iceServer.hostname]);
+  EXPECT_EQ(2u, iceServer.tlsAlpnProtocols.count);
+  EXPECT_EQ(2u, iceServer.tlsEllipticCurves.count);
+}
+
+@end
+
+TEST(RTCIceServerTest, OneURLTest) {
+  @autoreleasepool {
+    RTCIceServerTest *test = [[RTCIceServerTest alloc] init];
+    [test testOneURLServer];
+  }
+}
+
+TEST(RTCIceServerTest, TwoURLTest) {
+  @autoreleasepool {
+    RTCIceServerTest *test = [[RTCIceServerTest alloc] init];
+    [test testTwoURLServer];
+  }
+}
+
+TEST(RTCIceServerTest, PasswordCredentialTest) {
+  @autoreleasepool {
+    RTCIceServerTest *test = [[RTCIceServerTest alloc] init];
+    [test testPasswordCredential];
+  }
+}
+
+TEST(RTCIceServerTest, HostnameTest) {
+  @autoreleasepool {
+    RTCIceServerTest *test = [[RTCIceServerTest alloc] init];
+    [test testHostname];
+  }
+}
+
+TEST(RTCIceServerTest, InitFromNativeServerTest) {
+  @autoreleasepool {
+    RTCIceServerTest *test = [[RTCIceServerTest alloc] init];
+    [test testInitFromNativeServer];
+  }
+}