[DevTools] Send ack early when paused in mouse move to keep events coming.

content/browser/renderer_host/input/input_router_impl.cc

 // Copyright 2013 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.
 
 #include "content/browser/renderer_host/input/input_router_impl.h"
 
 #include <math.h>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 592 matching lines @@
     // HandleKeyboardEvent destroys this InputRouterImpl).
     // TODO(jdduke): crbug.com/274029 - Make ack-triggered shutdown async.
   }
 }
 
 void InputRouterImpl::ProcessMouseAck(blink::WebInputEvent::Type type,
                                       InputEventAckState ack_result) {
   if (type != WebInputEvent::MouseMove)
     return;
 
+  DCHECK(mouse_move_pending_);
   mouse_move_pending_ = false;
 
   if (next_mouse_move_) {
     DCHECK(next_mouse_move_->event.type == WebInputEvent::MouseMove);
     scoped_ptr<MouseEventWithLatencyInfo> next_mouse_move
         = next_mouse_move_.Pass();
     SendMouseEvent(*next_mouse_move);
   }
 }
 
@@ skipping 117 matching lines @@
 InputRouterImpl::QueuedWheelEvent::QueuedWheelEvent(
     const MouseWheelEventWithLatencyInfo& event,
     bool synthesized_from_pinch)
     : event(event), synthesized_from_pinch(synthesized_from_pinch) {
 }
 
 InputRouterImpl::QueuedWheelEvent::~QueuedWheelEvent() {
 }
 
 }  // namespace content