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 103 matching lines @@
 
 base::TimeDelta SyntheticGestureTargetBase::PointerAssumedStoppedTime()
     const {
   return base::TimeDelta::FromMilliseconds(kPointerAssumedStoppedTimeMs);
 }
 
 int SyntheticGestureTargetBase::GetTouchSlopInDips() const {
   return kTouchSlopInDips;
 }
 
+int SyntheticGestureTargetBase::GetMinScalingSpanInDips() const {
+  // The minimum scaling distance is only relevant for touch gestures and the
+  // base target doesn't support touch.
+  CHECK(false) << "Touch events not supported for this browser.";

[Sami, 2014/05/19 14:49:04]

This could be a NOTREACHED() too. Maybe also leave out the text description from
the binary since it's not really useful for anyone who doesn't know this code
already.

[Dominik Grewe, 2014/05/19 17:31:43]

Done.

+  return -1;
+}
+
 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