Implement WebContentsViewChildFrame::TakeFocus.

content/browser/web_contents/web_contents_view_child_frame.cc

 // Copyright (c) 2016 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_child_frame.h"
 
 #include "build/build_config.h"
+#include "content/browser/frame_host/render_frame_proxy_host.h"
 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents_view_delegate.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 using blink::WebDragOperation;
 using blink::WebDragOperationsMask;
 
 namespace content {
@@ skipping 127 matching lines @@
 
 void WebContentsViewChildFrame::UpdateDragCursor(WebDragOperation operation) {
   NOTREACHED();
 }
 
 void WebContentsViewChildFrame::GotFocus() {
   NOTREACHED();
 }
 
 void WebContentsViewChildFrame::TakeFocus(bool reverse) {
-  // TODO(avallee): http://crbug.com/610819 Advance focus to next element in
-  // outer WebContents.
+  RenderFrameProxyHost* rfp = web_contents_->GetMainFrame()
+                                  ->frame_tree_node()
+                                  ->render_manager()
+                                  ->GetProxyToOuterDelegate();
+  FrameTreeNode* outer_node = FrameTreeNode::GloballyFindByID(
+      web_contents_->GetOuterDelegateFrameTreeNodeId());
+  RenderFrameHostImpl* rfhi =
+      outer_node->parent()->render_manager()->current_frame_host();
+
+  rfhi->AdvanceFocus(
+      reverse ? blink::WebFocusTypeBackward : blink::WebFocusTypeForward, rfp);
 }
 
 void WebContentsViewChildFrame::ShowContextMenu(
     RenderFrameHost* render_frame_host,
     const ContextMenuParams& params) {
   NOTREACHED();
 }
 
 void WebContentsViewChildFrame::StartDragging(
     const DropData& drop_data,
     WebDragOperationsMask ops,
     const gfx::ImageSkia& image,
     const gfx::Vector2d& image_offset,
     const DragEventSourceInfo& event_info,
     RenderWidgetHostImpl* source_rwh) {
   NOTREACHED();
 }
 
 }  // namespace content