Move all the examples from the talk directory into the webrtc examples directory.

Significant changes:

- move the libjingle_examples.gyp file into webrtc directory.
- rename talk/examples/android to webrtc/examples/androidapp to avoid name conflicts.
- update paths in talk/libjingle_tests.gyp to point to webrtc directory for Objective-C test.

BUG=
R=pthatcher@webrtc.org, tkchin@webrtc.org

Review URL: https://codereview.webrtc.org/1235563006 .

Cr-Commit-Position: refs/heads/master@{#9681}
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.m
new file mode 100644
index 0000000..45a69cf
--- /dev/null
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.m
@@ -0,0 +1,162 @@
+/*
+ *  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 "ARDVideoCallView.h"
+
+#import <AVFoundation/AVFoundation.h>
+#import "UIImage+ARDUtilities.h"
+
+static CGFloat const kButtonPadding = 16;
+static CGFloat const kButtonSize = 48;
+static CGFloat const kLocalVideoViewSize = 120;
+static CGFloat const kLocalVideoViewPadding = 8;
+
+@interface ARDVideoCallView () <RTCEAGLVideoViewDelegate>
+@end
+
+@implementation ARDVideoCallView {
+  UIButton *_cameraSwitchButton;
+  UIButton *_hangupButton;
+  CGSize _localVideoSize;
+  CGSize _remoteVideoSize;
+  BOOL _useRearCamera;
+}
+
+@synthesize statusLabel = _statusLabel;
+@synthesize localVideoView = _localVideoView;
+@synthesize remoteVideoView = _remoteVideoView;
+@synthesize delegate = _delegate;
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  if (self = [super initWithFrame:frame]) {
+    _remoteVideoView = [[RTCEAGLVideoView alloc] initWithFrame:CGRectZero];
+    _remoteVideoView.delegate = self;
+    [self addSubview:_remoteVideoView];
+
+    // TODO(tkchin): replace this with a view that renders layer from
+    // AVCaptureSession.
+    _localVideoView = [[RTCEAGLVideoView alloc] initWithFrame:CGRectZero];
+    _localVideoView.delegate = self;
+    [self addSubview:_localVideoView];
+
+    // TODO(tkchin): don't display this if we can't actually do camera switch.
+    _cameraSwitchButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _cameraSwitchButton.backgroundColor = [UIColor whiteColor];
+    _cameraSwitchButton.layer.cornerRadius = kButtonSize / 2;
+    _cameraSwitchButton.layer.masksToBounds = YES;
+    UIImage *image = [UIImage imageNamed:@"ic_switch_video_black_24dp.png"];
+    [_cameraSwitchButton setImage:image forState:UIControlStateNormal];
+    [_cameraSwitchButton addTarget:self
+                      action:@selector(onCameraSwitch:)
+            forControlEvents:UIControlEventTouchUpInside];
+    [self addSubview:_cameraSwitchButton];
+
+    _hangupButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    _hangupButton.backgroundColor = [UIColor redColor];
+    _hangupButton.layer.cornerRadius = kButtonSize / 2;
+    _hangupButton.layer.masksToBounds = YES;
+    image = [UIImage imageForName:@"ic_call_end_black_24dp.png"
+                            color:[UIColor whiteColor]];
+    [_hangupButton setImage:image forState:UIControlStateNormal];
+    [_hangupButton addTarget:self
+                      action:@selector(onHangup:)
+            forControlEvents:UIControlEventTouchUpInside];
+    [self addSubview:_hangupButton];
+
+    _statusLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+    _statusLabel.font = [UIFont fontWithName:@"Roboto" size:16];
+    _statusLabel.textColor = [UIColor whiteColor];
+    [self addSubview:_statusLabel];
+  }
+  return self;
+}
+
+- (void)layoutSubviews {
+  CGRect bounds = self.bounds;
+  if (_remoteVideoSize.width > 0 && _remoteVideoSize.height > 0) {
+    // Aspect fill remote video into bounds.
+    CGRect remoteVideoFrame =
+        AVMakeRectWithAspectRatioInsideRect(_remoteVideoSize, bounds);
+    CGFloat scale = 1;
+    if (remoteVideoFrame.size.width > remoteVideoFrame.size.height) {
+      // Scale by height.
+      scale = bounds.size.height / remoteVideoFrame.size.height;
+    } else {
+      // Scale by width.
+      scale = bounds.size.width / remoteVideoFrame.size.width;
+    }
+    remoteVideoFrame.size.height *= scale;
+    remoteVideoFrame.size.width *= scale;
+    _remoteVideoView.frame = remoteVideoFrame;
+    _remoteVideoView.center =
+        CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
+  } else {
+    _remoteVideoView.frame = bounds;
+  }
+
+  if (_localVideoSize.width && _localVideoSize.height > 0) {
+    // Aspect fit local video view into a square box.
+    CGRect localVideoFrame =
+        CGRectMake(0, 0, kLocalVideoViewSize, kLocalVideoViewSize);
+    localVideoFrame =
+        AVMakeRectWithAspectRatioInsideRect(_localVideoSize, localVideoFrame);
+
+    // Place the view in the bottom right.
+    localVideoFrame.origin.x = CGRectGetMaxX(bounds)
+        - localVideoFrame.size.width - kLocalVideoViewPadding;
+    localVideoFrame.origin.y = CGRectGetMaxY(bounds)
+        - localVideoFrame.size.height - kLocalVideoViewPadding;
+    _localVideoView.frame = localVideoFrame;
+  } else {
+    _localVideoView.frame = bounds;
+  }
+
+  // Place hangup button in the bottom left.
+  _hangupButton.frame =
+      CGRectMake(CGRectGetMinX(bounds) + kButtonPadding,
+                 CGRectGetMaxY(bounds) - kButtonPadding -
+                     kButtonSize,
+                 kButtonSize,
+                 kButtonSize);
+
+  // Place button to the right of hangup button.
+  CGRect cameraSwitchFrame = _hangupButton.frame;
+  cameraSwitchFrame.origin.x =
+      CGRectGetMaxX(cameraSwitchFrame) + kButtonPadding;
+  _cameraSwitchButton.frame = cameraSwitchFrame;
+
+  [_statusLabel sizeToFit];
+  _statusLabel.center =
+      CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
+}
+
+#pragma mark - RTCEAGLVideoViewDelegate
+
+- (void)videoView:(RTCEAGLVideoView*)videoView didChangeVideoSize:(CGSize)size {
+  if (videoView == _localVideoView) {
+    _localVideoSize = size;
+    _localVideoView.hidden = CGSizeEqualToSize(CGSizeZero, _localVideoSize);
+  } else if (videoView == _remoteVideoView) {
+    _remoteVideoSize = size;
+  }
+  [self setNeedsLayout];
+}
+
+#pragma mark - Private
+
+- (void)onCameraSwitch:(id)sender {
+  [_delegate videoCallViewDidSwitchCamera:self];
+}
+
+- (void)onHangup:(id)sender {
+  [_delegate videoCallViewDidHangup:self];
+}
+
+@end