WebViewImpl: Speculatively request a BeginMainFrame for input

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2131 matching lines @@
   if (InspectorOverlay* overlay = inspectorOverlay()) {
     if (overlay->handleInputEvent(inputEvent))
       return WebInputEventResult::HandledSuppressed;
   }
 
   // Report the event to be NOT processed by WebKit, so that the browser can
   // handle it appropriately.
   if (m_ignoreInputEvents)
     return WebInputEventResult::NotHandled;
 
+  // Speculatively schedule an animation for this input event with the
+  // assumption that it will trigger one after being handled.
+  // TODO(skyostil): Only do this for certain types of input.
+  scheduleAnimationForWidget();
+
   AutoReset<const WebInputEvent*> currentEventChange(&m_currentInputEvent,
                                                      &inputEvent);
   UIEventWithKeyState::clearNewTabModifierSetFromIsolatedWorld();
 
   bool isPointerLocked = false;
   if (WebFrameWidgetBase* widget = mainFrameImpl()->frameWidget()) {
     if (WebWidgetClient* client = widget->client())
       isPointerLocked = client->isPointerLocked();
   }
 
@@ skipping 2042 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink