Removed the ScriptedSpeech content side.

Removal the corresponding changes in blink are applied in the following patch
https://codereview.chromium.org/599863002/

BUG=402536

Review URL: https://codereview.chromium.org/598923002

Cr-Commit-Position: refs/heads/master@{#296655}

content/browser/renderer_host/render_process_host_impl.cc

@@ -1232,7 +1232,6 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
 #if defined(OS_ANDROID)
     switches::kDisableGestureRequirementForMediaPlayback,
     switches::kDisableWebRTC,
-    switches::kEnableSpeechRecognition,
     switches::kMediaDrmEnableNonCompositing,
     switches::kNetworkCountryIso,
     switches::kDisableWebAudio,

content/child/runtime_features.cc

@@ -116,9 +116,6 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
     WebRuntimeFeatures::enablePeerConnection(false);
   }
 
-  if (!command_line.HasSwitch(switches::kEnableSpeechRecognition))
-    WebRuntimeFeatures::enableScriptedSpeech(false);
-
   // WebAudio is enabled by default on ARM and X86, if the MediaCodec
   // API is available.
   WebRuntimeFeatures::enableWebAudio(

content/public/android/java/src/org/chromium/content/common/ContentSwitches.java

@@ -61,9 +61,6 @@ public abstract class ContentSwitches {
     // Native switch - chrome_switches::kEnableInstantExtendedAPI
     public static final String ENABLE_INSTANT_EXTENDED_API = "enable-instant-extended-api";
 
-    // Native switch - content_switches::kEnableSpeechRecognition
-    public static final String ENABLE_SPEECH_RECOGNITION = "enable-speech-recognition";
-
     // Native switch - shell_switches::kDumpRenderTree
     public static final String DUMP_RENDER_TREE = "dump-render-tree";
 

content/public/common/content_switches.cc

@@ -885,9 +885,6 @@ const char kDisableOverscrollEdgeEffect[]   = "disable-overscroll-edge-effect";
 // WebRTC is enabled by default on Android.
 const char kDisableWebRTC[]                 = "disable-webrtc";
 
-// Enable the recognition part of the Web Speech API.
-const char kEnableSpeechRecognition[]       = "enable-speech-recognition";
-
 // Always use the video overlay for the embedded video.
 // This switch is intended only for tests.
 const char kForceUseOverlayEmbeddedVideo[] = "force-use-overlay-embedded-video";

content/public/common/content_switches.h

@@ -251,7 +251,6 @@ CONTENT_EXPORT extern const char kDisableGestureRequirementForMediaPlayback[];
 CONTENT_EXPORT extern const char kDisableClickDelay[];
 CONTENT_EXPORT extern const char kDisableOverscrollEdgeEffect[];
 CONTENT_EXPORT extern const char kDisableWebRTC[];
-CONTENT_EXPORT extern const char kEnableSpeechRecognition[];
 CONTENT_EXPORT extern const char kForceUseOverlayEmbeddedVideo[];
 CONTENT_EXPORT extern const char kHideScrollbars[];
 extern const char kNetworkCountryIso[];