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/ARDRoomServerClient.h b/webrtc/examples/objc/AppRTCDemo/ARDRoomServerClient.h
new file mode 100644
index 0000000..a9ff825
--- /dev/null
+++ b/webrtc/examples/objc/AppRTCDemo/ARDRoomServerClient.h
@@ -0,0 +1,33 @@
+/*
+ *  Copyright 2014 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>
+
+@class ARDJoinResponse;
+@class ARDMessageResponse;
+@class ARDSignalingMessage;
+
+@protocol ARDRoomServerClient <NSObject>
+
+- (void)joinRoomWithRoomId:(NSString *)roomId
+         completionHandler:(void (^)(ARDJoinResponse *response,
+                                     NSError *error))completionHandler;
+
+- (void)sendMessage:(ARDSignalingMessage *)message
+            forRoomId:(NSString *)roomId
+             clientId:(NSString *)clientId
+    completionHandler:(void (^)(ARDMessageResponse *response,
+                                NSError *error))completionHandler;
+
+- (void)leaveRoomWithRoomId:(NSString *)roomId
+                   clientId:(NSString *)clientId
+          completionHandler:(void (^)(NSError *error))completionHandler;
+
+@end