Disabled pinch zooming in non-browser Aura windows.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 0319aad4a8361c67c508983ce889fb23897409e9..dfde182320c8139710b04fd7fcb60f10d1ee8120 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -184,6 +184,7 @@
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/url_request/url_request_context.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebWindowFeatures.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/window_open_disposition.h"
@@ -1141,6 +1142,12 @@ void Browser::HandleKeyboardEvent(content::WebContents* source,
   window()->HandleKeyboardEvent(event);
 }
 
+bool Browser::PreHandleGestureEvent(content::WebContents* source,
+                                    const blink::WebGestureEvent& event) {
+  // Send all events
+  return false;
+}
+
 bool Browser::TabsNeedBeforeUnloadFired() {
   if (IsFastTabUnloadEnabled())
     return fast_unload_controller_->TabsNeedBeforeUnloadFired();