use enum to specify deviceSource for fling animation.

content/browser/renderer_host/input/gesture_event_queue.cc

 // Copyright 2014 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/gesture_event_queue.h"
 
 #include "base/debug/trace_event.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
@@ skipping 85 matching lines @@
   return ShouldForwardForZeroVelocityFlingStart(gesture_event) &&
       ShouldForwardForBounceReduction(gesture_event) &&
       ShouldForwardForGFCFiltering(gesture_event) &&
       ShouldForwardForTapSuppression(gesture_event) &&
       ShouldForwardForCoalescing(gesture_event);
 }
 
 bool GestureEventQueue::ShouldForwardForZeroVelocityFlingStart(
     const GestureEventWithLatencyInfo& gesture_event) const {
   return gesture_event.event.type != WebInputEvent::GestureFlingStart ||
-      gesture_event.event.sourceDevice != WebGestureEvent::Touchpad ||
-      gesture_event.event.data.flingStart.velocityX != 0 ||
-      gesture_event.event.data.flingStart.velocityY != 0;
+         gesture_event.event.sourceDevice != blink::WebGestureDeviceTouchpad ||
+         gesture_event.event.data.flingStart.velocityX != 0 ||
+         gesture_event.event.data.flingStart.velocityY != 0;
 }
 
 bool GestureEventQueue::ShouldForwardForGFCFiltering(
     const GestureEventWithLatencyInfo& gesture_event) const {
   return gesture_event.event.type != WebInputEvent::GestureFlingCancel ||
       !ShouldDiscardFlingCancelEvent(gesture_event);
 }
 
 bool GestureEventQueue::ShouldForwardForTapSuppression(
     const GestureEventWithLatencyInfo& gesture_event) {
   switch (gesture_event.event.type) {
     case WebInputEvent::GestureFlingCancel:
-      if (gesture_event.event.sourceDevice == WebGestureEvent::Touchscreen)
+      if (gesture_event.event.sourceDevice == blink::WebGestureDeviceTouchpad)
         touchscreen_tap_suppression_controller_.GestureFlingCancel();
       else
         touchpad_tap_suppression_controller_.GestureFlingCancel();
       return true;
     case WebInputEvent::GestureTapDown:
     case WebInputEvent::GestureShowPress:
     case WebInputEvent::GestureTapUnconfirmed:
     case WebInputEvent::GestureTapCancel:
     case WebInputEvent::GestureTap:
     case WebInputEvent::GestureDoubleTap:
-      if (gesture_event.event.sourceDevice == WebGestureEvent::Touchscreen) {
+      if (gesture_event.event.sourceDevice == blink::WebGestureDeviceTouchpad) {
         return !touchscreen_tap_suppression_controller_.FilterTapEvent(
             gesture_event);
       }
       return true;
     default:
       return true;
   }
 }
 
 bool GestureEventQueue::ShouldForwardForCoalescing(
@@ skipping 41 matching lines @@
   DCHECK_EQ(event_with_latency.event.type, type);
   event_with_latency.latency.AddNewLatencyFrom(latency);
 
   // Ack'ing an event may enqueue additional gesture events.  By ack'ing the
   // event before the forwarding of queued events below, such additional events
   // can be coalesced with existing queued events prior to dispatch.
   client_->OnGestureEventAck(event_with_latency, ack_result);
 
   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
   if (type == WebInputEvent::GestureFlingCancel) {
-    if (event_with_latency.event.sourceDevice == WebGestureEvent::Touchscreen)
+    if (event_with_latency.event.sourceDevice ==
+        blink::WebGestureDeviceTouchpad)
       touchscreen_tap_suppression_controller_.GestureFlingCancelAck(processed);
     else
       touchpad_tap_suppression_controller_.GestureFlingCancelAck(processed);
   }
   DCHECK_LT(event_index, coalesced_gesture_events_.size());
   coalesced_gesture_events_.erase(coalesced_gesture_events_.begin() +
                                   event_index);
 
   if (ignore_next_ack_) {
     ignore_next_ack_ = false;
@@ skipping 170 matching lines @@
     return 0;
 
   if (!ignore_next_ack_)
     return 1;
 
   DCHECK_GT(coalesced_gesture_events_.size(), 1U);
   return 2;
 }
 
 }  // namespace content