Disabled pinch zooming in non-browser Aura windows.

chrome/browser/devtools/devtools_window.cc

Index: chrome/browser/devtools/devtools_window.cc
diff --git a/chrome/browser/devtools/devtools_window.cc b/chrome/browser/devtools/devtools_window.cc
index e765988795d2fac970e8bcfd6b416e8ca7a62b96..4eef17ee37accae631be7626c06d82d2a7cfd8ba 100644
--- a/chrome/browser/devtools/devtools_window.cc
+++ b/chrome/browser/devtools/devtools_window.cc
@@ -66,6 +66,7 @@
 #include "content/public/common/url_constants.h"
 #include "extensions/common/extension_set.h"
 #include "grit/generated_resources.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::DictionaryValue;
@@ -933,6 +934,15 @@ void DevToolsWindow::WebContentsFocused(content::WebContents* contents) {
     inspected_browser->window()->WebContentsFocused(contents);
 }
 
+bool DevToolsWindow::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;
+}
+
 void DevToolsWindow::DispatchOnEmbedder(const std::string& message) {
   std::string method;
   base::ListValue empty_params;