Migrate accessibility from RenderView to RenderFrame.

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

Index: content/browser/accessibility/dump_accessibility_tree_browsertest.cc
diff --git a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
index de73995a11c5e54caaa9da621e4ff508e1a358e4..4b461be793f76878499552428976e4e8c42b9b9a 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -19,6 +19,7 @@
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
+#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/common/content_switches.h"
@@ -223,14 +224,14 @@ void DumpAccessibilityTreeTest::RunTest(
   // Wait for notifications. If there's a @WAIT-FOR directive, break when
   // the text we're waiting for appears in the dump, otherwise break after
   // the first notification, which will be a load complete.
-  RenderWidgetHostViewBase* host_view = static_cast<RenderWidgetHostViewBase*>(
-      shell()->web_contents()->GetRenderWidgetHostView());
+  WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
+      shell()->web_contents());
   std::string actual_contents;
   do {
     waiter->WaitForNotification();
     base::string16 actual_contents_utf16;
     AccessibilityTreeFormatter formatter(
-        host_view->GetBrowserAccessibilityManager()->GetRoot());
+        web_contents->GetRootBrowserAccessibilityManager()->GetRoot());
     formatter.SetFilters(filters);
     formatter.FormatAccessibilityTree(&actual_contents_utf16);
     actual_contents = base::UTF16ToUTF8(actual_contents_utf16);