Indicate whether a touch event will cause scrolling

content/browser/renderer_host/input/touch_emulator.h

 // Copyright 2014 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_TOUCH_EMULATOR_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EMULATOR_H_
 
 #include "content/browser/renderer_host/input/touch_emulator_client.h"
 #include "content/common/cursors/webcursor.h"
 #include "content/common/input/input_event_ack_state.h"
@@ skipping 39 matching lines @@
   // Returns cursor size in DIP.
   gfx::SizeF InitCursorFromResource(
       WebCursor* cursor, float scale, int resource_id);
   void ResetState();
   void UpdateCursor();
   bool UpdateShiftPressed(bool shift_pressed);
 
   // Whether we should convert scrolls into pinches.
   bool InPinchGestureMode() const;
 
-  bool FillTouchEventAndPoint(const blink::WebMouseEvent& mouse_event);
+  void FillTouchEventAndPoint(const blink::WebMouseEvent& mouse_event);
   void FillPinchEvent(const blink::WebInputEvent& event);
 
   // The following methods generate and pass gesture events to the renderer.
   void PinchBegin(const blink::WebGestureEvent& event);
   void PinchUpdate(const blink::WebGestureEvent& event);
   void PinchEnd(const blink::WebGestureEvent& event);
   void ScrollEnd(const blink::WebGestureEvent& event);
 
-  void ForwardTouchEventToClient();
+  // Offers the emulated event to |gesture_provider_|, conditionally forwarding
+  // it to the client if appropriate.
+  void HandleEmulatedTouchEvent(blink::WebTouchEvent event);
 
   TouchEmulatorClient* const client_;
   ui::FilteredGestureProvider gesture_provider_;
 
   // Disabled emulator does only process touch acks left from previous
   // emulation. It does not intercept any events.
   bool enabled_;
 
   // While emulation is on, default cursor is touch. Pressing shift changes
   // cursor to the pinch one.
@@ skipping 24 matching lines @@
   // The cumulative scale change from the start of pinch gesture.
   float pinch_scale_;
   bool pinch_gesture_active_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchEmulator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_EMULATOR_H_