[Chromecast] Correct some Cast dependencies in //chrome/browser/ui.

chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc

 // Copyright 2014 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 "chrome/browser/ui/aura/accessibility/ax_tree_source_aura.h"
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/accessibility/ax_aura_obj_wrapper.h"
 #include "ui/views/accessibility/ax_view_obj_wrapper.h"
-#include "ui/views/controls/webview/webview.h"
+
+#if defined(TOOLKIT_VIEWS)
+#include "ui/views/controls/webview/webview.h"  // nogncheck
+#endif
 
 using views::AXAuraObjCache;
 using views::AXAuraObjWrapper;
 
 AXTreeSourceAura::AXTreeSourceAura() {
   root_.reset(new AXRootObjWrapper(AXAuraObjCache::GetInstance()->GetNextID()));
 }
 
 AXTreeSourceAura::~AXTreeSourceAura() {
   root_.reset();
@@ skipping 106 matching lines @@
 
   std::vector<AXAuraObjWrapper*> children;
   root->GetChildren(&children);
 
   prefix += prefix[0];
   for (size_t i = 0; i < children.size(); ++i)
     output += ToString(children[i], prefix);
 
   return output;
 }