Enable speech input by default and remove unused code.

chrome/common/render_messages_internal.h

 // Copyright (c) 2011 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 <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "build/build_config.h"
@@ skipping 1050 matching lines @@
 IPC_MESSAGE_ROUTED0(ViewMsg_GetMalwareDOMDetails)
 
 // Tells the renderer to begin phishing detection for the given toplevel URL
 // which it has started loading.
 IPC_MESSAGE_ROUTED1(ViewMsg_StartPhishingDetection, GURL)
 
 // External popup menus.
 IPC_MESSAGE_ROUTED1(ViewMsg_SelectPopupMenuItem,
                     int /* selected index, -1 means no selection */)
 
-// Indicate whether speech input API is enabled or not.
-IPC_MESSAGE_CONTROL1(ViewMsg_SpeechInput_SetFeatureEnabled,
-                     bool /* enabled */)
-
 // Sent in response to a ViewHostMsg_ContextMenu to let the renderer know that
 // the menu has been closed.
 IPC_MESSAGE_ROUTED1(ViewMsg_ContextMenuClosed,
                     webkit_glue::CustomContextMenuContext /* custom_context */)
 
 //-----------------------------------------------------------------------------
 // TabContents messages
 // These are messages sent from the renderer to the browser process.
 
 // Sent by the renderer when it is creating a new window.  The browser creates
@@ skipping 1460 matching lines @@
 // while performing stress testing.
 IPC_MESSAGE_ROUTED2(ViewMsg_JavaScriptStressTestControl,
                     int /* cmd */,
                     int /* param */)
 
 // Register a new handler for URL requests with the given scheme.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_RegisterProtocolHandler,
                     std::string /* scheme */,
                     GURL /* url */,
                     string16 /* title */)