Getting RenderWidgetHostViewWin ready for a GestureRecognizer.

ui/views/events/event.h

 // Copyright (c) 2012 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 UI_VIEWS_EVENTS_EVENT_H_
 #define UI_VIEWS_EVENTS_EVENT_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 397 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(ScrollEvent);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // GestureEvent class
 //
 ////////////////////////////////////////////////////////////////////////////////
 class VIEWS_EXPORT GestureEvent : public LocatedEvent,
                                   public ui::GestureEvent {
  public:
+  GestureEvent(ui::EventType type,
+               int x,
+               int y,
+               int flags,
+               base::Time time_stamp,
+               float delta_x,
+               float delta_y,
+               unsigned int touch_ids_bitfield);
+
   explicit GestureEvent(const NativeEvent& native_event);
 
   // Create a new GestureEvent which is identical to the provided model.
   // If source / target views are provided, the model location will be converted
   // from |source| coordinate system to |target| coordinate system.
   GestureEvent(const GestureEvent& model, View* source, View* target);
 
   virtual ~GestureEvent();
 
   float delta_x() const { return delta_x_; }
   float delta_y() const { return delta_y_; }
 
  protected:
   GestureEvent(ui::EventType type, int x, int y, int flags);
 
  private:
   friend class internal::RootView;
 
   GestureEvent(const GestureEvent& model, View* root);
 
   // Overridden from ui::GestureEvent.
   virtual int GetLowestTouchId() const OVERRIDE;
 
   float delta_x_;
   float delta_y_;
 
+  // The set of indices of ones in the binary representation of
+  // touch_ids_bitfield_ is the set of touch_ids associate with this gesture.

[sky, 2012/05/03 22:39:19]

Place |s variable names in comments, eg |touch_ids_bitfield_|.

+  // This value is stored as a bitfield because the number of touch ids varies,
+  // but we currently don't need more than 32 touches at a time.
+  const unsigned int touch_ids_bitfield_;
+
   DISALLOW_COPY_AND_ASSIGN(GestureEvent);
 };
 
 class VIEWS_EXPORT GestureEventForTest : public GestureEvent {
  public:
   GestureEventForTest(ui::EventType type, int x, int y, int flags);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GestureEventForTest);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_EVENTS_EVENT_H_