Synthesize ctrl-wheel events on touchpad pinch

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 29 matching lines @@
 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,
                                                   int modifiers);
-  static blink::WebGestureEvent BuildPinchUpdate(float scale,
-                                                 float anchor_x,
-                                                 float anchor_y,
-                                                 int modifiers);
+  static blink::WebGestureEvent BuildPinchUpdate(
+      float scale,
+      float anchor_x,
+      float anchor_y,
+      int modifiers,
+      blink::WebGestureEvent::SourceDevice sourceDevice);

[jdduke (slow), 2014/05/01 15:44:47]

Hmm, I'd say |source_device| but it looks like we're already not very consistent
with the casing in some of these tests, oh well.

[Rick Byers, 2014/05/01 17:34:57]

Sigh.  I find it hard enough moving between blink and chromium coding style,
it's even worse when you have a file in chromium making extensive use of blink
types (with, eg. WebGestureEvent::sourceDevice) <grin>.  Anyway I've updated the
param names to match chromium convention.

   static blink::WebGestureEvent BuildFling(
       float velocity_x,
       float velocity_y,
       blink::WebGestureEvent::SourceDevice source_device);
 };
 
 class CONTENT_EXPORT SyntheticWebTouchEvent
     : public NON_EXPORTED_BASE(blink::WebTouchEvent) {
  public:
   SyntheticWebTouchEvent();
 
   // Mark all the points as stationary, and remove any released points.
   void ResetPoints();
 
   // Adds an additional point to the touch list, returning the point's index.
   int PressPoint(float x, float y);
   void MovePoint(int index, float x, float y);
   void ReleasePoint(int index);
   void CancelPoint(int index);
 
   void SetTimestamp(base::TimeDelta timestamp);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_