Introduce "disable-speech-api" content flag and add it to WebView.

content/public/common/content_switches.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/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 224 matching lines @@
 // For tests, disable single thread scheduler and only manually composite.
 const char kDisableSingleThreadProxyScheduler[] =
     "disable-single-thread-proxy-scheduler";
 
 // Disable smooth scrolling for testing.
 const char kDisableSmoothScrolling[]        = "disable-smooth-scrolling";
 
 // Disables the use of a 3D software rasterizer.
 const char kDisableSoftwareRasterizer[]     = "disable-software-rasterizer";
 
+// Disables the Web Speech API.
+const char kDisableSpeechAPI[]                 = "disable-speech-api";
+
 // Disables SVG 1.1 DOM.
 const char kDisableSVG1DOM[]                = "disable-svg1dom";
 
 // Disable text blob rendering.
 const char kDisableTextBlobs[]              = "disable-text-blobs";
 
 // Disable multithreaded GPU compositing of web content.
 const char kDisableThreadedCompositing[]     = "disable-threaded-compositing";
 
 // Disable multithreaded, compositor scrolling of web content.
@@ skipping 748 matching lines @@
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Enables the use of NPAPI plugins.
 const char kEnableNpapi[]                   = "enable-npapi";
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches