Patch 2/3 to get WebScheduler via WebThread

public/platform/WebThread.h

Index: public/platform/WebThread.h
diff --git a/public/platform/WebThread.h b/public/platform/WebThread.h
index ff37d9f3378071880898df206fe7dbd1a420b653..df5476a228f199bc63243b8125b8bc4ff881fe22 100644
--- a/public/platform/WebThread.h
+++ b/public/platform/WebThread.h
@@ -33,6 +33,7 @@
 #endif
 
 namespace blink {
+class WebScheduler;
 class WebTraceLocation;
 
 // Always an integer value.
@@ -77,6 +78,9 @@ public:
     virtual void addTaskObserver(TaskObserver*) { }
     virtual void removeTaskObserver(TaskObserver*) { }
 
+    // Returns the scheduler associated with the thread.
+    virtual WebScheduler* scheduler() const = 0;
+
     // enterRunLoop() processes tasks posted to this WebThread. This call does not return until some task calls exitRunLoop().
     // WebThread does not support nesting, meaning that once the run loop is entered for a given WebThread it is not valid to
     // call enterRunLoop() again.