Allow speech input feature to be disabled.

chrome/chrome_tests.gypi

 # 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.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 1922 matching lines @@
           ],
         }],
         ['configuration_policy==0', {
           'sources!': [
             'browser/prefs/proxy_policy_unittest.cc',
           ],
           'sources/': [
             ['exclude', '^browser/policy/'],
           ],
         }],
+        ['input_speech==0', {
+          'sources/': [
+            ['exclude', '^browser/speech/'],
+          ],
+        }],
         ['safe_browsing==1', {
           'defines': [
             'ENABLE_SAFE_BROWSING',
           ],
         }, {  # safe_browsing == 0
           'sources!': [
             'browser/download/download_safe_browsing_client_unittest.cc',
           ],
           'sources/': [
             ['exclude', '^browser/safe_browsing/'],
@@ skipping 633 matching lines @@
         ['toolkit_views==0', {
           'sources!': [
             'browser/extensions/extension_input_apitest.cc',
           ],
         }],
         ['configuration_policy==0', {
           'sources/': [
             ['exclude', '^browser/policy/'],
           ],
         }],
+        ['input_speech==0', {
+          'sources/': [
+            ['exclude', '^browser/speech/'],
+            ['exclude', '^../content/browser/speech/'],
+          ],
+        }],
         ['safe_browsing==1', {
           'defines': [
             'ENABLE_SAFE_BROWSING',
           ],
         }, {  # safe_browsing == 0
           'sources/': [
             ['exclude', '^browser/safe_browsing/'],
             ['exclude', '^renderer/safe_browsing/'],
           ],
         }],
@@ skipping 1439 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }