Synthetic pinch gesture take scale factor as parameter.

content/browser/renderer_host/input/synthetic_gesture_target_android.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_GESTURE_TARGET_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/time/time.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
@@ skipping 19 matching lines @@
       const blink::WebMouseWheelEvent& web_wheel,
       const ui::LatencyInfo& latency_info) OVERRIDE;
   virtual void DispatchWebMouseEventToPlatform(
       const blink::WebMouseEvent& web_mouse,
       const ui::LatencyInfo& latency_info) OVERRIDE;
 
   // SyntheticGestureTarget:
   virtual SyntheticGestureParams::GestureSourceType
       GetDefaultSyntheticGestureSourceType() const OVERRIDE;
 
-  virtual int GetTouchSlopInDips() const OVERRIDE;
+  virtual float GetTouchSlopInDips() const OVERRIDE;
+
+  virtual float GetMinScalingSpanInDips() const OVERRIDE;
 
  private:
   // Enum values below need to be kept in sync with TouchEventSynthesizer.java
   enum Action {
     ActionInvalid = -1,
     ActionStart = 0,
     ActionMove = 1,
     ActionCancel = 2,
     ActionEnd = 3
   };
 
   void TouchSetPointer(JNIEnv* env, int index, int x, int y, int id);
   void TouchInject(
       JNIEnv* env, Action action, int pointer_count, int64 time_in_ms);
 
   base::android::ScopedJavaGlobalRef<jobject> touch_event_synthesizer_;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticGestureTargetAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_ANDROID_H_