Revert of compositor-worker: Refactor CompositorWorkerManager

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index a53a62ebee18386d956f77bddc650c2dcb559f20..9924046c06274895a68b8c075cf0e06005fa1ab5 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -433,10 +433,6 @@
 
     // Returns an interface to the main thread. Can be null if blink was initialized on a thread without a message loop.
     BLINK_PLATFORM_EXPORT WebThread* mainThread() const;
-
-    // Returns an interface to the compositor thread. This can be null if the
-    // renderer was created with threaded rendering desabled.
-    virtual WebThread* compositorThread() const { return 0; }
 
     // Vibration -----------------------------------------------------------