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}

webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m

@@ -0,0 +1,85 @@
+/*
+ *  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 "ARDMainViewController.h"
+
+#import "ARDAppClient.h"
+#import "ARDMainView.h"
+#import "ARDVideoCallViewController.h"
+
+@interface ARDMainViewController () <ARDMainViewDelegate>
+@end
+
+@implementation ARDMainViewController
+
+- (void)loadView {
+  ARDMainView *mainView = [[ARDMainView alloc] initWithFrame:CGRectZero];
+  mainView.delegate = self;
+  self.view = mainView;
+}
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+  // Terminate any calls when we aren't active.
+  [self dismissViewControllerAnimated:NO completion:nil];
+}
+
+#pragma mark - ARDMainViewDelegate
+
+- (void)mainView:(ARDMainView *)mainView didInputRoom:(NSString *)room {
+  if (!room.length) {
+    return;
+  }
+  // Trim whitespaces.
+  NSCharacterSet *whitespaceSet = [NSCharacterSet whitespaceCharacterSet];
+  NSString *trimmedRoom = [room stringByTrimmingCharactersInSet:whitespaceSet];
+
+  // Check that room name is valid.
+  NSError *error = nil;
+  NSRegularExpressionOptions options = NSRegularExpressionCaseInsensitive;
+  NSRegularExpression *regex =
+      [NSRegularExpression regularExpressionWithPattern:@"\\w+"
+                                                options:options
+                                                  error:&error];
+  if (error) {
+    [self showAlertWithMessage:error.localizedDescription];
+    return;
+  }
+  NSRange matchRange =
+      [regex rangeOfFirstMatchInString:trimmedRoom
+                               options:0
+                                 range:NSMakeRange(0, trimmedRoom.length)];
+  if (matchRange.location == NSNotFound ||
+      matchRange.length != trimmedRoom.length) {
+    [self showAlertWithMessage:@"Invalid room name."];
+    return;
+  }
+
+  // Kick off the video call.
+  ARDVideoCallViewController *videoCallViewController =
+      [[ARDVideoCallViewController alloc] initForRoom:trimmedRoom];
+  videoCallViewController.modalTransitionStyle =
+      UIModalTransitionStyleCrossDissolve;
+  [self presentViewController:videoCallViewController
+                     animated:YES
+                   completion:nil];
+}
+
+#pragma mark - Private
+
+- (void)showAlertWithMessage:(NSString*)message {
+  UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
+                                                      message:message
+                                                     delegate:nil
+                                            cancelButtonTitle:@"OK"
+                                            otherButtonTitles:nil];
+  [alertView show];
+}
+
+@end