Implement support for touch-action: pan-x/pan-y in chromium

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 "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 179 matching lines @@
   key_queue_.push_back(key_event);
   HISTOGRAM_COUNTS_100("Renderer.KeyboardQueueSize", key_queue_.size());
 
   gesture_event_filter_->FlingHasBeenHalted();
 
   // Only forward the non-native portions of our event.
   FilterAndSendWebInputEvent(key_event, latency_info, is_keyboard_shortcut);
 }
 
 void InputRouterImpl::SendGestureEvent(
-    const GestureEventWithLatencyInfo& gesture_event) {
-  if (touch_action_filter_.FilterGestureEvent(gesture_event.event))
+    const GestureEventWithLatencyInfo& original_gesture_event) {
+  GestureEventWithLatencyInfo gesture_event(original_gesture_event);
+  if (touch_action_filter_.FilterGestureEvent(&gesture_event.event))
     return;
 
   touch_event_queue_->OnGestureScrollEvent(gesture_event);
 
   if (!IsInOverscrollGesture() &&
       !gesture_event_filter_->ShouldForward(gesture_event)) {
     OverscrollController* controller = client_->GetOverscrollController();
     if (controller)
       controller->DiscardingGestureEvent(gesture_event.event);
     return;
@@ skipping 508 matching lines @@
       break;
   }
 }
 
 bool InputRouterImpl::IsInOverscrollGesture() const {
   OverscrollController* controller = client_->GetOverscrollController();
   return controller && controller->overscroll_mode() != OVERSCROLL_NONE;
 }
 
 }  // namespace content