Make the ContentGestureProvider a ui::FilteredGestureProvider

content/browser/renderer_host/input/web_input_event_util.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_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_
 
 #include "content/common/content_export.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
-namespace blink {
-class WebKeyboardEvent;
+namespace ui{
+struct GestureEventData;
 }
 
 namespace content {
 
 // Update |event|'s windowsKeyCode and keyIdentifer properties using the
 // provided |windows_key_code|.
 CONTENT_EXPORT void UpdateWindowsKeyCodeAndKeyIdentifier(
     blink::WebKeyboardEvent* event,
     ui::KeyboardCode windows_key_code);
 
-}
+// Converts a ui::GestureEventData payload to a WebGestureEvent, using the
+// |scale| multiplier on all relevant gesture components.  Note that on Android,
+// this will be the inverse of the DPI scale (scaling from pixels to DIPs).
+CONTENT_EXPORT blink::WebGestureEvent CreateWebGestureEventFromGestureEventData(

[tdresser, 2014/03/03 19:44:32]

Should this go in content/browser/renderer_host/ui_events_helper.*?
Seems to fit a bit better there than here.

[jdduke (slow), 2014/03/03 22:33:17]

I believe that has an events target dependency, and is only compiled on Aura.

+    const ui::GestureEventData& data,
+    float scale);
+
+}  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_WEB_INPUT_EVENT_UTIL_H_