Revert of Removed the ScriptedSpeech content side. (patchset #2 id:20001 of...

Revert of Removed the ScriptedSpeech content side. (patchset #2 id:20001 of https://codereview.chromium.org/598923002/)

Reason for revert:
I'm sorry, the ENABLE_SPEECH_RECOGNITION switch is still used in the Chrome on
Android repo. I don't see (on the short term) another way of handling this than
not removing that switch. I'm going to revert this change.

Original issue's description:
> Removed the ScriptedSpeech content side.
>
> Removal the corresponding changes in blink are applied in the following patch
> https://codereview.chromium.org/599863002/
>
> BUG=402536
>
> Committed: https://crrev.com/6b8dda12a7d842517c5c4ee155cf48951e908a7f
> Cr-Commit-Position: refs/heads/master@{#296655}

TBR=avi@chromium.org,mohan.reddy@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=402536

Review URL: https://codereview.chromium.org/602083002

Cr-Commit-Position: refs/heads/master@{#296692}

content/browser/renderer_host/render_process_host_impl.cc

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

content/child/runtime_features.cc

@@ -111,6 +111,9 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kDisableWebRTC))
     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

@@ -61,6 +61,9 @@ 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

@@ -885,6 +885,9 @@ 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

@@ -251,6 +251,7 @@ 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[];