Synthesize ctrl-wheel events on touchpad pinch

content/common/input/synthetic_web_input_event_builders.h

Index: content/common/input/synthetic_web_input_event_builders.h
diff --git a/content/common/input/synthetic_web_input_event_builders.h b/content/common/input/synthetic_web_input_event_builders.h
index 5df4cd6109aa7809a0d7c8b74135fb30fee5c637..416cb117bc2d702fda33dd4ae03276a22d933ea9 100644
--- a/content/common/input/synthetic_web_input_event_builders.h
+++ b/content/common/input/synthetic_web_input_event_builders.h
@@ -47,10 +47,12 @@ class CONTENT_EXPORT SyntheticWebGestureEventBuilder {
   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,