Enable pinch-zoom telemetry on Mac

content/browser/renderer_host/input/synthetic_gesture_target_mac.h

Index: content/browser/renderer_host/input/synthetic_gesture_target_mac.h
diff --git a/content/browser/renderer_host/input/synthetic_gesture_target_mac.h b/content/browser/renderer_host/input/synthetic_gesture_target_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..87b2939bf68244a38b3976604e76cf7189bba312
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+++ b/content/browser/renderer_host/input/synthetic_gesture_target_mac.h
@@ -0,0 +1,31 @@
+// Copyright 2015 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_MAC_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_MAC_H_
+
+#include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
+#include "content/browser/renderer_host/render_widget_host_view_mac.h"
+#include "content/common/input/synthetic_gesture_params.h"
+
+namespace content {
+
+// SyntheticGestureTarget implementation for mac
+class SyntheticGestureTargetMac : public SyntheticGestureTargetBase {
+ public:
+  SyntheticGestureTargetMac(RenderWidgetHostImpl* host,
+                            RenderWidgetHostViewCocoa* cocoa_view);
+
+  // SyntheticGestureTarget:
+  void DispatchInputEventToPlatform(const blink::WebInputEvent& event) override;
+
+ private:
+  RenderWidgetHostViewCocoa* cocoa_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(SyntheticGestureTargetMac);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_MAC_H_