We do not pass enums by conts references. This CL fixes style errors introduced

content/browser/web_contents/web_contents_view_aura.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/web_contents/web_contents_view_aura.h"
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/dip_util.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/web_contents/interstitial_page_impl.h"
@@ skipping 388 matching lines @@
 
 gfx::Rect WebContentsViewAura::GetViewBounds() const {
   return window_->GetBoundsInRootWindow();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, RenderViewHostDelegateView implementation:
 
 void WebContentsViewAura::ShowContextMenu(
     const content::ContextMenuParams& params,
-    const content::ContextMenuSourceType& type) {
+    content::ContextMenuSourceType type) {
   if (delegate_.get())
     delegate_->ShowContextMenu(params, type);
 }
 
 void WebContentsViewAura::ShowPopupMenu(const gfx::Rect& bounds,
                                         int item_height,
                                         double item_font_size,
                                         int selected_item,
                                         const std::vector<WebMenuItem>& items,
                                         bool right_aligned,
@@ skipping 224 matching lines @@
     OnDragEntered(event);
 
   web_contents_->GetRenderViewHost()->DragTargetDrop(
       event.location(),
       gfx::Screen::GetCursorScreenPoint(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   return current_drag_op_;
 }