Disabled pinch zooming in non-browser Aura windows.

chrome/browser/extensions/extension_host.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 29 matching lines @@
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_error.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/runtime_data.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_urls.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/manifest_handlers/background_info.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/window_open_disposition.h"
 
 using content::BrowserContext;
 using content::OpenURLParams;
 using content::RenderProcessHost;
 using content::RenderViewHost;
 using content::SiteInstance;
 using content::WebContents;
 
@@ skipping 410 matching lines @@
 }
 
 void ExtensionHost::RequestMediaAccessPermission(
     content::WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback) {
   MediaCaptureDevicesDispatcher::GetInstance()->ProcessMediaAccessRequest(
       web_contents, request, callback, extension());
 }
 
+bool ExtensionHost::PreHandleGestureEvent(
+    content::WebContents* source,
+    const blink::WebGestureEvent& event) {
+  // Disable pinch zooming.
+  return event.type == blink::WebGestureEvent::GesturePinchBegin ||
+      event.type == blink::WebGestureEvent::GesturePinchUpdate ||
+      event.type == blink::WebGestureEvent::GesturePinchEnd;
+}
+
 }  // namespace extensions