chrome: Remove the use of WebWorkerRunLoop.

content/child/blink_platform_impl.h

Index: content/child/blink_platform_impl.h
diff --git a/content/child/blink_platform_impl.h b/content/child/blink_platform_impl.h
index 2c1764ff5215431c1fe2625ad14cd7418f87c48d..9445ea662f59253cfb5c5d0d0b709123e49b032b 100644
--- a/content/child/blink_platform_impl.h
+++ b/content/child/blink_platform_impl.h
@@ -31,6 +31,10 @@ namespace base {
 class MessageLoop;
 }
 
+namespace blink {
+class WebWorkerRunLoop;
+}
+
 namespace content {
 class FlingCurveConfiguration;
 class NotificationDispatcher;
@@ -153,6 +157,8 @@ class CONTENT_EXPORT BlinkPlatformImpl
       const blink::WebWorkerRunLoop& runLoop);
   virtual void didStopWorkerRunLoop(
       const blink::WebWorkerRunLoop& runLoop);
+  virtual void didStartWorkerRunLoop();
+  virtual void didStopWorkerRunLoop();
   virtual blink::WebCrypto* crypto();
   virtual blink::WebGeofencingProvider* geofencingProvider();
   virtual blink::WebBluetooth* bluetooth();