Make zoom using ctrl+mouse wheel work in win aura. Windows -non-aura had a hack that was a layering…

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
===================================================================
--- content/browser/web_contents/web_contents_impl.cc	(revision 180972)
+++ content/browser/web_contents/web_contents_impl.cc	(working copy)
@@ -1320,6 +1320,18 @@
     delegate_->HandleKeyboardEvent(this, event);
 }
 
+bool WebContentsImpl::PreHandleWheelEvent(
+    const WebKit::WebMouseWheelEvent& event) {
+  if (delegate_ &&
+      event.wheelTicksY &&
+      (event.modifiers & WebKit::WebInputEvent::ControlKey)) {
+    delegate_->ContentsZoomChange(event.wheelTicksY > 0);
+    return true;
+  }
+
+  return false;
+}
+
 void WebContentsImpl::HandleMouseDown() {
   if (delegate_)
     delegate_->HandleMouseDown();