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

content/common/input/synthetic_web_input_event_builders.h

 // 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.
 
 #ifndef CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_
 #define CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_
 
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
@@ skipping 24 matching lines @@
 class CONTENT_EXPORT SyntheticWebKeyboardEventBuilder {
  public:
   static blink::WebKeyboardEvent Build(blink::WebInputEvent::Type type);
 };
 
 class CONTENT_EXPORT SyntheticWebGestureEventBuilder {
  public:
   static blink::WebGestureEvent Build(
       blink::WebInputEvent::Type type,
       blink::WebGestureEvent::SourceDevice sourceDevice);
+  static blink::WebGestureEvent BuildScrollBegin(float dx_hint,
+                                                  float dy_hint);
   static blink::WebGestureEvent BuildScrollUpdate(float dx,
-                                                   float dY,
+                                                   float dy,
                                                    int modifiers);
   static blink::WebGestureEvent BuildPinchUpdate(float scale,
                                                   float anchor_x,
                                                   float anchor_y,
                                                   int modifiers);
   static blink::WebGestureEvent BuildFling(
       float velocity_x,
       float velocity_y,
       blink::WebGestureEvent::SourceDevice source_device);
 };
@@ skipping 16 matching lines @@
 };
 
 class CONTENT_EXPORT SyntheticWebTouchEventBuilder {
  public:
   static SyntheticWebTouchEvent Build(blink::WebInputEvent::Type type);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_