Make SpeechRecognition per RenderFrame instead of per RenderView.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index b6e49ba32f80c4445ac50b67c6973622b60f8487..9965c65d3c5a2442aa2899c399c2d5931855f5e6 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -90,6 +90,7 @@ class RenderViewImpl;
 class RenderWidget;
 class RenderWidgetFullscreenPepper;
 class ScreenOrientationDispatcher;
+class SpeechRecognitionDispatcher;
 class UserMediaClientImpl;
 enum class SandboxFlags;
 struct CommitNavigationParams;
@@ -508,6 +509,7 @@ class CONTENT_EXPORT RenderFrameImpl
         const blink::WebAXObject& end_object,
         int end_offset);
   virtual void didChangeManifest(blink::WebLocalFrame*);
+  virtual blink::WebSpeechRecognizer* speechRecognizer();
 
   // WebMediaPlayerDelegate implementation:
   void DidPlay(blink::WebMediaPlayer* player) override;
@@ -837,6 +839,10 @@ class CONTENT_EXPORT RenderFrameImpl
   // process.
   ManifestManager* manifest_manager_;
 
+  // The speech recognition dispatcher attached to this frame, lazily
+  // initialized.
+  SpeechRecognitionDispatcher* speech_recognition_dispatcher_;
+
   // The current accessibility mode.
   AccessibilityMode accessibility_mode_;