Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

third_party/WebKit/public/platform/WebFrameScheduler.h

Index: third_party/WebKit/public/platform/WebFrameScheduler.h
diff --git a/third_party/WebKit/public/platform/WebFrameScheduler.h b/third_party/WebKit/public/platform/WebFrameScheduler.h
index 59bc25ba009fa8c6b36ee7bd47675586dc6adabd..6d11c0f536aa065ccb7234dcabb38459acb8d684 100644
--- a/third_party/WebKit/public/platform/WebFrameScheduler.h
+++ b/third_party/WebKit/public/platform/WebFrameScheduler.h
@@ -13,6 +13,7 @@ namespace blink {
 
 class WebSecurityOrigin;
 class WebTaskRunner;
+class WebViewScheduler;
 
 class BLINK_PLATFORM_EXPORT WebFrameScheduler {
 public:
@@ -40,6 +41,17 @@ public:
     // JavaScript is discouraged. WebFrameScheduler owns the returned
     // WebTaskRunner.
     virtual WebTaskRunner* unthrottledTaskRunner() { return nullptr; }
+
+    // Returns the parent WebViewScheduler.
+    virtual WebViewScheduler* webViewScheduler() { return nullptr; }
+
+    // Tells the scheduler a resource load has started. The scheduler may make
+    // policy decisions based on this.
+    virtual void incrementPendingResourceLoadCount() { }
+
+    // Tells the scheduler a resource load has started. The scheduler may make
+    // policy decisions based on this.
+    virtual void decrementPendingResourceLoadCount() { }
 };
 
 } // namespace blink