Make sure there are no modifiers when escape is pressed.

content/browser/browser_plugin/browser_plugin_embedder.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 "content/browser/browser_plugin/browser_plugin_embedder.h"
 
 #include "base/values.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 139 matching lines @@
       web_contents(),
       browser_plugin_instance_id,
       base::Bind(&BrowserPluginEmbedder::OnGuestCallback,
                  base::Unretained(this),
                  browser_plugin_instance_id,
                  params));
 }
 
 bool BrowserPluginEmbedder::HandleKeyboardEvent(
     const NativeWebKeyboardEvent& event) {
-  if (event.windowsKeyCode != ui::VKEY_ESCAPE)
+  if ((event.windowsKeyCode != ui::VKEY_ESCAPE) ||
+      (event.modifiers & blink::WebInputEvent::InputModifiers)) {
     return false;
+  }
 
   bool event_consumed = false;
   GetBrowserPluginGuestManager()->ForEachGuest(
       GetWebContents(),
       base::Bind(&BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
                  base::Unretained(this),
                  &event_consumed));
 
   return event_consumed;
 }
 
 bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
                                                            WebContents* guest) {
   *mouse_unlocked |= static_cast<WebContentsImpl*>(guest)
                          ->GetBrowserPluginGuest()
                          ->mouse_locked();
   guest->GotResponseToLockMouseRequest(false);
 
   // Returns false to iterate over all guests.
   return false;
 }
 
 }  // namespace content