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 e1454b3b71cc5dac8317340bdff3aa996d4bfeb6..1183691e5b992f4f01894ef148931d18117a9e04 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:
@@ -32,6 +33,17 @@ public:
     // Returns the WebTaskRunner for timer tasks.
     // WebFrameScheduler owns the returned WebTaskRunner.
     virtual WebTaskRunner* timerTaskRunner() { 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