Remove {Start,Stop}Listening methods from Platform classes

This change removes StartListening() and StopListening() methods from
Platform and RendererBlinkPlatformImpl since they are not called
anymore.

Bug: 855308
Change-Id: I8f240737ca7d37abc1eb3267701f76854742d83d
Reviewed-on: https://chromium-review.googlesource.com/1144224Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Oksana Zhuravlova <oksamyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577258}

content/renderer/renderer_blink_platform_impl.cc

@@ -1072,16 +1072,6 @@ blink::InterfaceProvider* RendererBlinkPlatformImpl::GetInterfaceProvider() {
   return blink_interface_provider_.get();
 }
 
-void RendererBlinkPlatformImpl::StartListening(
-    blink::WebPlatformEventType type,
-    blink::WebPlatformEventListener* listener) {
-
-}
-
-void RendererBlinkPlatformImpl::StopListening(
-    blink::WebPlatformEventType type) {
-}
-
 //------------------------------------------------------------------------------
 
 blink::WebPushProvider* RendererBlinkPlatformImpl::PushProvider() {

content/renderer/renderer_blink_platform_impl.h

@@ -187,9 +187,6 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
   blink::WebString ConvertIDNToUnicode(const blink::WebString& host) override;
   service_manager::Connector* GetConnector() override;
   blink::InterfaceProvider* GetInterfaceProvider() override;
-  void StartListening(blink::WebPlatformEventType,
-                      blink::WebPlatformEventListener*) override;
-  void StopListening(blink::WebPlatformEventType) override;
   blink::WebThread* CurrentThread() override;
   blink::BlameContext* GetTopLevelBlameContext() override;
   void RecordRappor(const char* metric,
@@ -248,10 +245,6 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
-  // TODO(crbug.com/850997): Remove when Device*EventPump classes are
-  // moved to blink
-  void StopDeviceSensorEventPump(blink::WebPlatformEventType type);
-
   // Ensure that the WebDatabaseHost has been initialized.
   void InitializeWebDatabaseHostIfNeeded();
 

third_party/blink/public/platform/platform.h

@@ -101,7 +101,6 @@ class WebCanvasCaptureHandler;
 class WebCookieJar;
 class WebCrypto;
 class WebDatabaseObserver;
-class WebPlatformEventListener;
 class WebFileSystem;
 class WebGraphicsContext3DProvider;
 class WebIDBFactory;
@@ -631,18 +630,6 @@ class BLINK_PLATFORM_EXPORT Platform {
 
   virtual const char* GetBrowserServiceName() const { return ""; }
 
-  // Platform events -----------------------------------------------------
-  // Device Orientation, Device Motion, Battery, Gamepad.
-
-  // Request the platform to start listening to the events of the specified
-  // type and notify the given listener (if not null) when there is an update.
-  virtual void StartListening(WebPlatformEventType type,
-                              WebPlatformEventListener* listener) {}
-
-  // Request the platform to stop listening to the specified event and no
-  // longer notify the listener, if any.
-  virtual void StopListening(WebPlatformEventType type) {}
-
   // This method converts from the supplied DOM code enum to the
   // embedder's DOM code value for the key pressed. |dom_code| values are
   // based on the value defined in