Extract minimal RenderViewHost interface for embedders, leaving

content/browser/accessibility/dump_accessibility_tree_browsertest.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 <string>
 
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/string16.h"
@@ skipping 34 matching lines @@
 class DumpAccessibilityTreeTest : public InProcessBrowserTest {
  public:
   DumpAccessibilityTreeHelper helper_;
 };
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
                        PlatformTreeDifferenceTest) {
   content::RenderWidgetHostView* host_view =
       browser()->GetSelectedWebContents()->GetRenderWidgetHostView();
   RenderWidgetHost* host = host_view->GetRenderWidgetHost();
-  RenderViewHost* view_host = static_cast<RenderViewHost*>(host);
+  // TODO(joi): Remove this dependency
+  RenderViewHostImpl* view_host =
+      static_cast<RenderViewHostImpl*>(RenderWidgetHostImpl::From(host));
   view_host->set_save_accessibility_tree_for_testing(true);
   view_host->EnableRendererAccessibility();
 
   // Setup test paths.
   FilePath dir_test_data;
   EXPECT_TRUE(PathService::Get(content::DIR_TEST_DATA, &dir_test_data));
   FilePath test_path(dir_test_data.Append(FILE_PATH_LITERAL("accessibility")));
   EXPECT_TRUE(file_util::PathExists(test_path))
       << test_path.LossyDisplayName();
 
@@ skipping 46 matching lines @@
 
       EXPECT_TRUE(file_util::WriteFile(
           actual_file, actual_contents8.c_str(), actual_contents8.size()));
 
       ADD_FAILURE() << "No expectation found. Create it by doing:\n"
           << "mv " << actual_file.LossyDisplayName() << " "
           << expected_file.LossyDisplayName();
     }
   } while (!(html_file = file_enumerator.Next()).empty());
 }