Move webrtc behind flag(--enable-webrtc) for M27 branch

chrome/browser/about_flags.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/about_flags.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <iterator>
@@ skipping 373 matching lines @@
     IDS_FLAGS_DISABLE_WEBGL_NAME,
     IDS_FLAGS_DISABLE_WEBGL_DESCRIPTION,
     kOsDesktop,
 #if defined(OS_ANDROID)
     SINGLE_VALUE_TYPE("")
 #else
     SINGLE_VALUE_TYPE(switches::kDisableExperimentalWebGL)
 #endif
   },
   {
-    "disable-webrtc",
-    IDS_FLAGS_DISABLE_WEBRTC_NAME,
-    IDS_FLAGS_DISABLE_WEBRTC_DESCRIPTION,
+    "enable-webrtc",
+    IDS_FLAGS_ENABLE_WEBRTC_NAME,
+    IDS_FLAGS_ENABLE_WEBRTC_DESCRIPTION,
     kOsAndroid,
 #if defined(OS_ANDROID)
-    SINGLE_VALUE_TYPE(switches::kDisableWebRTC)
+    SINGLE_VALUE_TYPE(switches::kEnableWebRTC)
 #else
     SINGLE_VALUE_TYPE("")
 #endif
   },
   {
     "fixed-position-creates-stacking-context",
     IDS_FLAGS_FIXED_POSITION_CREATES_STACKING_CONTEXT_NAME,
     IDS_FLAGS_FIXED_POSITION_CREATES_STACKING_CONTEXT_DESCRIPTION,
     kOsAll,
     ENABLE_DISABLE_VALUE_TYPE(
@@ skipping 1346 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags