Synthetic pinch gesture take scale factor as parameter.

content/browser/renderer_host/input/synthetic_gesture_target_base.cc

 // 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.
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
 #include "content/common/input_messages.h"
@@ skipping 10 matching lines @@
 namespace content {
 namespace {
 
 // This value was determined experimentally. It was sufficient to not cause a
 // fling on Android and Aura.
 const int kPointerAssumedStoppedTimeMs = 100;
 
 // SyntheticGestureTargetBase passes input events straight on to the renderer
 // without going through a gesture recognition framework. There is thus no touch
 // slop.
-const int kTouchSlopInDips = 0;
+const float kTouchSlopInDips = 0.0f;
 
 }  // namespace
 
 SyntheticGestureTargetBase::SyntheticGestureTargetBase(
     RenderWidgetHostImpl* host)
     : host_(host) {
   DCHECK(host);
 }
 
 SyntheticGestureTargetBase::~SyntheticGestureTargetBase() {
@@ skipping 68 matching lines @@
 SyntheticGestureParams::GestureSourceType
 SyntheticGestureTargetBase::GetDefaultSyntheticGestureSourceType() const {
   return SyntheticGestureParams::MOUSE_INPUT;
 }
 
 base::TimeDelta SyntheticGestureTargetBase::PointerAssumedStoppedTime()
     const {
   return base::TimeDelta::FromMilliseconds(kPointerAssumedStoppedTimeMs);
 }
 
-int SyntheticGestureTargetBase::GetTouchSlopInDips() const {
+float SyntheticGestureTargetBase::GetTouchSlopInDips() const {
   return kTouchSlopInDips;
 }
 
+float SyntheticGestureTargetBase::GetMinScalingSpanInDips() const {
+  // The minimum scaling distance is only relevant for touch gestures and the
+  // base target doesn't support touch.
+  NOTREACHED();
+  return 0.0f;
+}
+
 bool SyntheticGestureTargetBase::PointIsWithinContents(int x, int y) const {
   gfx::Rect bounds = host_->GetView()->GetViewBounds();
   bounds -= bounds.OffsetFromOrigin();  // Translate the bounds to (0,0).
   return bounds.Contains(x, y);
 }
 
 }  // namespace content