Don't throttle web views until they've been in the background for 10s

third_party/WebKit/Source/platform/WebFrameScheduler.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebFrameScheduler_h
 #define WebFrameScheduler_h
 
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class WebTaskRunner;
 class WebViewScheduler;
 
 class WebFrameScheduler {
  public:
   virtual ~WebFrameScheduler() {}
 
   // The scheduler may throttle tasks associated with offscreen frames.
   virtual void setFrameVisible(bool) {}
 
-  // Tells the scheduler that the page this frame belongs to is not visible.
-  // The scheduler may throttle tasks associated with pages that are not
-  // visible.
-  virtual void setPageVisible(bool) {}
+  // Tells the scheduler that the page this frame belongs to supposed to be
+  // throttled (because it's not been visible for a few seconds).
+  virtual void setPageThrottled(bool) {}
 
   // Set whether this frame is suspended. Only unthrottledTaskRunner tasks are
   // allowed to run on a suspended frame.
   virtual void setSuspended(bool) {}
 
   // Set whether this frame is cross origin w.r.t. the top level frame. Cross
   // origin frames may use a different scheduling policy from same origin
   // frames.
   virtual void setCrossOrigin(bool) {}
 
@@ skipping 30 matching lines @@
   virtual void setDocumentParsingInBackground(bool) {}
 
   // Tells the scheduler that the first meaningful paint has occured for this
   // frame.
   virtual void onFirstMeaningfulPaint() {}
 };
 
 }  // namespace blink
 
 #endif  // WebFrameScheduler_h