Cross-process iframe accessibility.

content/browser/frame_host/render_widget_host_view_child_frame.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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/view_messages.h"
@@ skipping 231 matching lines @@
 }
 #endif  // defined(USE_AURA)
 
 bool RenderWidgetHostViewChildFrame::LockMouse() {
   return false;
 }
 
 void RenderWidgetHostViewChildFrame::UnlockMouse() {
 }
 
+void RenderWidgetHostViewChildFrame::
+    CreateBrowserAccessibilityManagerIfNeeded() {
+  if (GetBrowserAccessibilityManager())
+    return;
+
+  SetBrowserAccessibilityManager(BrowserAccessibilityManager::Create(
+      BrowserAccessibilityManager::GetEmptyDocument(), host_));
+}
+
 #if defined(OS_MACOSX)
 void RenderWidgetHostViewChildFrame::SetActive(bool active) {
 }
 
 void RenderWidgetHostViewChildFrame::SetTakesFocusOnlyOnMouseDown(bool flag) {
 }
 
 void RenderWidgetHostViewChildFrame::SetWindowVisibility(bool visible) {
 }
 
@@ skipping 83 matching lines @@
     const {
   return NULL;
 }
 #endif // defined(OS_WIN)
 
 SkBitmap::Config RenderWidgetHostViewChildFrame::PreferredReadbackFormat() {
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content