Renamed RTCStatsReport to RTCLegacyStatsReport in objc files.

This is to avoid a naming conflict with webrtc::RTCStatsReport that is
surfaced if you try to include it in peerconnectioninterface.h.

Background: The current stats is very much non-spec-compliant. A new
stats collection API is underway that is meant to be spec-compliant.
Some classes in Chromium and webrtc/sdk/objc have spec-compliant names
but non-spec-compliant behavior. These are being renamed to "Legacy" so
that new spec-compliant classes can be added with the correct names.

BUG=chromium:627816
TBR=tkchin@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/2313943002
Cr-Commit-Position: refs/heads/master@{#14150}
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCStatsReport+Private.h b/webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport+Private.h
similarity index 79%
rename from webrtc/sdk/objc/Framework/Classes/RTCStatsReport+Private.h
rename to webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport+Private.h
index e1af6f7..67eb318 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCStatsReport+Private.h
+++ b/webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport+Private.h
@@ -8,15 +8,15 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "WebRTC/RTCStatsReport.h"
+#import "WebRTC/RTCLegacyStatsReport.h"
 
 #include "webrtc/api/statstypes.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface RTCStatsReport ()
+@interface RTCLegacyStatsReport ()
 
-/** Initialize an RTCStatsReport object from a native StatsReport. */
+/** Initialize an RTCLegacyStatsReport object from a native StatsReport. */
 - (instancetype)initWithNativeReport:(const webrtc::StatsReport &)nativeReport;
 
 @end
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCStatsReport.mm b/webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport.mm
similarity index 91%
rename from webrtc/sdk/objc/Framework/Classes/RTCStatsReport.mm
rename to webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport.mm
index 1bc3eb9..a55bb3e 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCStatsReport.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport.mm
@@ -8,14 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "RTCStatsReport+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 
 #import "NSString+StdString.h"
 #import "WebRTC/RTCLogging.h"
 
 #include "webrtc/base/checks.h"
 
-@implementation RTCStatsReport
+@implementation RTCLegacyStatsReport
 
 @synthesize timestamp = _timestamp;
 @synthesize type = _type;
@@ -23,7 +23,7 @@
 @synthesize values = _values;
 
 - (NSString *)description {
-  return [NSString stringWithFormat:@"RTCStatsReport:\n%@\n%@\n%f\n%@",
+  return [NSString stringWithFormat:@"RTCLegacyStatsReport:\n%@\n%@\n%f\n%@",
                                     _reportId,
                                     _type,
                                     _timestamp,
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm
index ccbd58f..2c4571e 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm
@@ -12,7 +12,7 @@
 
 #import "NSString+StdString.h"
 #import "RTCMediaStreamTrack+Private.h"
-#import "RTCStatsReport+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 
 #include "webrtc/base/checks.h"
 
@@ -21,7 +21,7 @@
 class StatsObserverAdapter : public StatsObserver {
  public:
   StatsObserverAdapter(void (^completionHandler)
-      (NSArray<RTCStatsReport *> *stats)) {
+      (NSArray<RTCLegacyStatsReport *> *stats)) {
     completion_handler_ = completionHandler;
   }
 
@@ -33,8 +33,8 @@
     RTC_DCHECK(completion_handler_);
     NSMutableArray *stats = [NSMutableArray arrayWithCapacity:reports.size()];
     for (const auto* report : reports) {
-      RTCStatsReport *statsReport =
-          [[RTCStatsReport alloc] initWithNativeReport:*report];
+      RTCLegacyStatsReport *statsReport =
+          [[RTCLegacyStatsReport alloc] initWithNativeReport:*report];
       [stats addObject:statsReport];
     }
     completion_handler_(stats);
@@ -42,7 +42,7 @@
   }
 
  private:
-  void (^completion_handler_)(NSArray<RTCStatsReport *> *stats);
+  void (^completion_handler_)(NSArray<RTCLegacyStatsReport *> *stats);
 };
 }  // namespace webrtc
 
@@ -51,7 +51,7 @@
 - (void)statsForTrack:(RTCMediaStreamTrack *)mediaStreamTrack
      statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
     completionHandler:
-    (void (^)(NSArray<RTCStatsReport *> *stats))completionHandler {
+    (void (^)(NSArray<RTCLegacyStatsReport *> *stats))completionHandler {
   rtc::scoped_refptr<webrtc::StatsObserverAdapter> observer(
       new rtc::RefCountedObject<webrtc::StatsObserverAdapter>
           (completionHandler));
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm
index 0af400b..b4a8738 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm
@@ -14,13 +14,13 @@
 #import "RTCConfiguration+Private.h"
 #import "RTCDataChannel+Private.h"
 #import "RTCIceCandidate+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 #import "RTCMediaConstraints+Private.h"
 #import "RTCMediaStream+Private.h"
 #import "RTCPeerConnectionFactory+Private.h"
 #import "RTCRtpReceiver+Private.h"
 #import "RTCRtpSender+Private.h"
 #import "RTCSessionDescription+Private.h"
-#import "RTCStatsReport+Private.h"
 #import "WebRTC/RTCLogging.h"
 
 #include <memory>
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCStatsReport.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCLegacyStatsReport.h
similarity index 95%
rename from webrtc/sdk/objc/Framework/Headers/WebRTC/RTCStatsReport.h
rename to webrtc/sdk/objc/Framework/Headers/WebRTC/RTCLegacyStatsReport.h
index 5a55967..14d996c 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCStatsReport.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCLegacyStatsReport.h
@@ -16,7 +16,7 @@
 
 /** This does not currently conform to the spec. */
 RTC_EXPORT
-@interface RTCStatsReport : NSObject
+@interface RTCLegacyStatsReport : NSObject
 
 /** Time since 1970-01-01T00:00:00Z in milliseconds. */
 @property(nonatomic, readonly) CFTimeInterval timestamp;
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCPeerConnection.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCPeerConnection.h
index 3ea97c3..4438eb2 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCPeerConnection.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCPeerConnection.h
@@ -23,7 +23,7 @@
 @class RTCRtpReceiver;
 @class RTCRtpSender;
 @class RTCSessionDescription;
-@class RTCStatsReport;
+@class RTCLegacyStatsReport;
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -217,7 +217,7 @@
     (nullable RTCMediaStreamTrack *)mediaStreamTrack
      statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
     completionHandler:
-    (nullable void (^)(NSArray<RTCStatsReport *> *stats))completionHandler;
+    (nullable void (^)(NSArray<RTCLegacyStatsReport *> *stats))completionHandler;
 
 @end
 
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/WebRTC.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/WebRTC.h
index 502d59e..8082d02 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/WebRTC.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/WebRTC.h
@@ -21,6 +21,7 @@
 #import <WebRTC/RTCFileLogger.h>
 #import <WebRTC/RTCIceCandidate.h>
 #import <WebRTC/RTCIceServer.h>
+#import <WebRTC/RTCLegacyStatsReport.h>
 #import <WebRTC/RTCLogging.h>
 #import <WebRTC/RTCMacros.h>
 #import <WebRTC/RTCMediaConstraints.h>
@@ -38,7 +39,6 @@
 #import <WebRTC/RTCRtpSender.h>
 #import <WebRTC/RTCSSLAdapter.h>
 #import <WebRTC/RTCSessionDescription.h>
-#import <WebRTC/RTCStatsReport.h>
 #import <WebRTC/RTCTracing.h>
 #import <WebRTC/RTCVideoFrame.h>
 #import <WebRTC/RTCVideoRenderer.h>