Make first TouchStart and first TouchMove events on a flinging layer non-blocking

content/renderer/input/render_widget_input_handler.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 CONTENT_RENDERER_INPUT_RENDER_WIDGET_INPUT_HANDLER_H_
 #define CONTENT_RENDERER_INPUT_RENDER_WIDGET_INPUT_HANDLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 87 matching lines @@
 
   // Indicates if the next sequence of Char events should be suppressed or not.
   bool suppress_next_char_events_;
 
   // The time spent in input handlers this frame. Used to throttle input acks.
   base::TimeDelta total_input_handling_time_this_frame_;
 
   // Whether we should not send ack for the current mouse move.
   bool ignore_ack_for_mouse_move_from_debugger_;
 
+  // True if waiting on first touch move after a touch start.

[dtapuska, 2016/08/10 14:47:42]

ditto. If the event conveyed this info; then we wouldn't need to store it in
various places

+  bool waiting_for_first_touch_move_;
+
   std::unique_ptr<InputEventAck> pending_input_event_ack_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetInputHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_RENDER_WIDGET_INPUT_HANDLER_H_