[DevTools] Don't send multiple mouse move acks when paused in debugger.

content/renderer/render_widget.cc

 // Copyright (c) 2012 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/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 1064 matching lines @@
         // send us the same kind of event we are delaying the ack for.
         Send(pending_input_event_ack_.release());
       }
       pending_input_event_ack_ = response.Pass();
       if (compositor_)
         compositor_->NotifyInputThrottledUntilCommit();
     } else {
       Send(response.release());
     }
   }
-  ignore_ack_for_mouse_move_from_debugger_ = false;
+  if (input_event->type == WebInputEvent::MouseMove)
+    ignore_ack_for_mouse_move_from_debugger_ = false;
 
 #if defined(OS_ANDROID)
   // Allow the IME to be shown when the focus changes as a consequence
   // of a processed touch end event.
   if (input_event->type == WebInputEvent::TouchEnd && processed)
     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
 #elif defined(USE_AURA)
   // Show the virtual keyboard if enabled and a user gesture triggers a focus
   // change.
   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
@@ skipping 417 matching lines @@
 bool RenderWidget::ShouldHandleImeEvent() {
 #if defined(OS_ANDROID)
   return !!webwidget_ && outstanding_ime_acks_ == 0;
 #else
   return !!webwidget_;
 #endif
 }
 
 bool RenderWidget::SendAckForMouseMoveFromDebugger() {
   if (handling_event_type_ == WebInputEvent::MouseMove) {
-    InputHostMsg_HandleInputEvent_ACK_Params ack;
-    ack.type = handling_event_type_;
-    ack.state = INPUT_EVENT_ACK_STATE_CONSUMED;
-    Send(new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
+    // If we pause multiple times during a single mouse move event, we should
+    // only send ACK once.
+    if (!ignore_ack_for_mouse_move_from_debugger_) {
+      InputHostMsg_HandleInputEvent_ACK_Params ack;
+      ack.type = handling_event_type_;
+      ack.state = INPUT_EVENT_ACK_STATE_CONSUMED;
+      Send(new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
+    }
     return true;
   }
   return false;
 }
 
 void RenderWidget::IgnoreAckForMouseMoveFromDebugger() {
   ignore_ack_for_mouse_move_from_debugger_ = true;
 }
 
 void RenderWidget::SetDeviceScaleFactor(float device_scale_factor) {
@@ skipping 553 matching lines @@
 
 void RenderWidget::RegisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.RemoveObserver(frame);
 }
 
 }  // namespace content