Add timestamps to synthesized events.

content/browser/renderer_host/input/synthetic_gesture_controller.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/synthetic_gesture_controller.h"
 
 #include "base/debug/trace_event.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
 #include "content/common/input_messages.h"
@@ skipping 15 matching lines @@
 
   // Start forwarding input events if the queue was previously empty.
   if (pending_gesture_queue_.size() == 1)
     StartGesture(*pending_gesture_queue_.front());
 }
 
 void SyntheticGestureController::Flush(base::TimeTicks timestamp) {
   if (pending_gesture_queue_.empty())
     return;
 
-  if (last_tick_time_.is_null()) {
-    last_tick_time_ = timestamp;
-    gesture_target_->SetNeedsFlush();
-    return;
-  }
-
-  base::TimeDelta interval = timestamp - last_tick_time_;
-  last_tick_time_ = timestamp;
   SyntheticGesture::Result result =
-      pending_gesture_queue_.front()->ForwardInputEvents(interval,
+      pending_gesture_queue_.front()->ForwardInputEvents(timestamp,
                                                          gesture_target_.get());
 
   if (result == SyntheticGesture::GESTURE_RUNNING) {
     gesture_target_->SetNeedsFlush();
     return;
   }
 
   StopGesture(*pending_gesture_queue_.front(), result);
   pending_gesture_queue_.erase(pending_gesture_queue_.begin());
 
-  if (!pending_gesture_queue_.empty()) {
+  if (!pending_gesture_queue_.empty())
     StartGesture(*pending_gesture_queue_.front());
-  } else {
-    // Reset last_tick_time_ so that we don't use an old value when a new
-    // gestures is queued.
-    last_tick_time_ = base::TimeTicks();
-  }
 }
 
 void SyntheticGestureController::StartGesture(const SyntheticGesture& gesture) {
   TRACE_EVENT_ASYNC_BEGIN0("benchmark", "SyntheticGestureController::running",
                            &gesture);
   gesture_target_->SetNeedsFlush();
 }
 
 void SyntheticGestureController::StopGesture(
     const SyntheticGesture& gesture, SyntheticGesture::Result result) {
   DCHECK_NE(result, SyntheticGesture::GESTURE_RUNNING);
   TRACE_EVENT_ASYNC_END0("benchmark", "SyntheticGestureController::running",
                          &gesture);
 
   gesture_target_->OnSyntheticGestureCompleted(result);
 }
 
 }  // namespace content