Let blink scheduler know when background parsing a document

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 558cecd3323138ee05d38a8c98b6dc47ed62c054..2509f0700422663758adf393c82ac0e40cf501bd 100644
--- a/third_party/WebKit/public/platform/WebFrameScheduler.h
+++ b/third_party/WebKit/public/platform/WebFrameScheduler.h
@@ -52,6 +52,11 @@ public:
     // Tells the scheduler a resource load has stopped. The scheduler may make
     // policy decisions based on this.
     virtual void didStopLoading(unsigned long identifier) { }
+
+    // Tells the scheduler if we are parsing a document on another thread. This
+    // tells the scheduler not to advance virtual time if it's using the
+    // DETERMINISTIC_LOADING policy.
+    virtual void setDocumentParsingInBackground(bool) {}
 };
 
 } // namespace blink