Make touch-based synthetic gesture take touch slop into account.

content/browser/renderer_host/input/synthetic_pinch_gesture.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_SYNTHETIC_PINCH_GESTURE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
 
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/browser/renderer_host/input/synthetic_web_input_event_builders.h"
 #include "content/common/content_export.h"
 #include "content/common/input/synthetic_pinch_gesture_params.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
 namespace content {
 
 class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture {
  public:
   explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params);
   virtual ~SyntheticPinchGesture();
 
   virtual SyntheticGesture::Result ForwardInputEvents(
       const base::TimeDelta& interval, SyntheticGestureTarget* target) OVERRIDE;
 
  private:
   SyntheticPinchGestureParams params_;

[jdduke (slow), 2013/12/02 16:29:43]

I didn't realize the private vars were before the private methods here.  The
order should be reversed (methods before vars), could you do that in your pinch
gesture refactoring (maybe you already did?)?

[Dominik Grewe, 2013/12/02 16:42:26]

Yeah, I noticed that when refactoring. I'll upload it in a separate patch.

   float current_y_0_;
   float current_y_1_;
   float target_y_0_;
   float target_y_1_;
   bool started_;
   SyntheticWebTouchEvent touch_event_;
 
   SyntheticGesture::Result ForwardTouchInputEvents(
       const base::TimeDelta& interval, SyntheticGestureTarget* target);
 
   void ForwardTouchEvent(SyntheticGestureTarget* target);
 
+  void SetupCoordinates(SyntheticGestureTarget* target);
   float GetDeltaForPointer0(const base::TimeDelta& interval) const;
   float ComputeAbsoluteRemainingDistance() const;
   bool HasFinished() const;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticPinchGesture);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_