Remove redundant 'escape to quit fullscreen/mouse lock' code.

content/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2011 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/renderer_host/render_widget_host_view_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with net::URLRequestStatus::Status.
 #include "content/common/view_messages.h"
@@ skipping 185 matching lines @@
                                    GdkEventConfigure* event,
                                    RenderWidgetHostViewGtk* host_view) {
     host_view->widget_center_valid_ = false;
     host_view->mouse_has_been_warped_to_new_center_ = false;
     return FALSE;
   }
 
   static gboolean OnKeyPressReleaseEvent(GtkWidget* widget,
                                          GdkEventKey* event,
                                          RenderWidgetHostViewGtk* host_view) {
-    // ESC exits mouse lock.
-    if (host_view->mouse_locked_ && event->keyval == GDK_Escape) {
-      host_view->UnlockMouse();
-      return TRUE;
-    }
     // Force popups or fullscreen windows to close on Escape so they won't keep
     // the keyboard grabbed or be stuck onscreen if the renderer is hanging.
     bool should_close_on_escape =
         (host_view->IsPopup() && host_view->NeedsInputGrab()) ||
         host_view->is_fullscreen_;
     if (should_close_on_escape && GDK_Escape == event->keyval) {
       host_view->host_->Shutdown();
     } else {
       // Send key event to input method.
       host_view->im_context_->ProcessKeyEvent(event);
@@ skipping 1176 matching lines @@
   }
 }
 
 // static
 void RenderWidgetHostView::GetDefaultScreenInfo(
     WebKit::WebScreenInfo* results) {
   GdkWindow* gdk_window =
       gdk_display_get_default_group(gdk_display_get_default());
   content::GetScreenInfoFromNativeWindow(gdk_window, results);
 }