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

content/common/input/synthetic_web_input_event_builders.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/common/input/synthetic_web_input_event_builders.h"
 
 #include "base/logging.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
 namespace content {
@@ skipping 71 matching lines @@
 WebGestureEvent SyntheticWebGestureEventBuilder::Build(
     WebInputEvent::Type type,
     WebGestureEvent::SourceDevice source_device) {
   DCHECK(WebInputEvent::isGestureEventType(type));
   WebGestureEvent result;
   result.type = type;
   result.sourceDevice = source_device;
   return result;
 }
 
+WebGestureEvent SyntheticWebGestureEventBuilder::BuildScrollBegin(
+    float dx_hint,
+    float dy_hint) {
+  WebGestureEvent result = Build(WebInputEvent::GestureScrollBegin,
+                                 WebGestureEvent::Touchscreen);
+  result.data.scrollBegin.deltaXHint = dx_hint;
+  result.data.scrollBegin.deltaYHint = dy_hint;
+  return result;
+}
+
 WebGestureEvent SyntheticWebGestureEventBuilder::BuildScrollUpdate(
     float dx,
     float dy,
     int modifiers) {
   WebGestureEvent result = Build(WebInputEvent::GestureScrollUpdate,
                                  WebGestureEvent::Touchscreen);
   result.data.scrollUpdate.deltaX = dx;
   result.data.scrollUpdate.deltaY = dy;
   result.modifiers = modifiers;
   return result;
@@ skipping 81 matching lines @@
 
 SyntheticWebTouchEvent SyntheticWebTouchEventBuilder::Build(
     WebInputEvent::Type type) {
   DCHECK(WebInputEvent::isTouchEventType(type));
   SyntheticWebTouchEvent result;
   result.type = type;
   return result;
 };
 
 }  // namespace content