Implement web speech synthesis.

content/renderer/render_thread_impl.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 "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 780 matching lines @@
   // Enabled by default for testing.
   // TODO(urvang): Go back to using the command-line option after a few days.
   WebRuntimeFeatures::enableWebPInAcceptHeader(true);
 
   WebRuntimeFeatures::enableExperimentalWebSocket(
       command_line.HasSwitch(switches::kEnableExperimentalWebSocket));
 
   WebRuntimeFeatures::enableExperimentalCanvasFeatures(
       command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures));
 
+  WebRuntimeFeatures::enableSpeechSynthesis(
+      command_line.HasSwitch(switches::kEnableSpeechSynthesis));
+
   FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
 
   devtools_agent_message_filter_ = new DevToolsAgentFilter();
   AddFilter(devtools_agent_message_filter_.get());
 
   if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
     ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 void RenderThreadImpl::RegisterSchemes() {
@@ skipping 505 matching lines @@
 
 void RenderThreadImpl::SetFlingCurveParameters(
     const std::vector<float>& new_touchpad,
     const std::vector<float>& new_touchscreen) {
   webkit_platform_support_->SetFlingCurveParameters(new_touchpad,
                                                     new_touchscreen);
 
 }
 
 }  // namespace content