Implement sequential focus navigation for OOPIF.

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "content/common/content_export.h"
@@ skipping 11 matching lines @@
 #include "content/public/common/context_menu_params.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/message_port_types.h"
 #include "content/public/common/page_importance_signals.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/resource_response.h"
 #include "content/public/common/three_d_api_types.h"
 #include "content/public/common/transition_element.h"
 #include "ipc/ipc_message_macros.h"
+#include "third_party/WebKit/public/platform/WebFocusType.h"
 #include "third_party/WebKit/public/web/WebFrameOwnerProperties.h"
 #include "third_party/WebKit/public/web/WebTreeScopeType.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/common/pepper_renderer_instance_data.h"
 #endif
 
@@ skipping 671 matching lines @@
 // Get html data by serializing the target frame and replacing all resource
 // links with a path to the local copy passed in the message payload.
 IPC_MESSAGE_ROUTED3(FrameMsg_GetSerializedHtmlWithLocalLinks,
                     std::vector<GURL> /* urls that have local copy */,
                     std::vector<base::FilePath> /* paths of local copy */,
                     base::FilePath /* local directory path */)
 
 IPC_MESSAGE_ROUTED1(FrameMsg_SetFrameOwnerProperties,
                     blink::WebFrameOwnerProperties /* frame_owner_properties */)
 
+// Request to continue running the sequential focus navigation algorithm in
+// this frame.  |source_routing_id| identifies the frame that issued this
+// request.  This message is sent when pressing <tab> or <shift-tab> needs to
+// find the next focusable element in a cross-process frame.
+IPC_MESSAGE_ROUTED2(FrameMsg_AdvanceFocus,
+                    blink::WebFocusType /* type */,
+                    int /* source_routing_id */)
+
 #if defined(ENABLE_PLUGINS)
 // Notifies the renderer of updates to the Plugin Power Saver origin whitelist.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdatePluginContentOriginWhitelist,
                     std::set<url::Origin> /* origin_whitelist */)
 #endif  // defined(ENABLE_PLUGINS)
 
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
 // Blink and JavaScript error messages to log to the console
@@ skipping 510 matching lines @@
 
 // Response to FrameMsg_GetSerializedHtmlWithLocalLinks.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_SerializedHtmlWithLocalLinksResponse,
                     std::string /* data buffer */,
                     bool /* end of data? */)
 
 // Sent when the renderer updates hint for importance of a tab.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_UpdatePageImportanceSignals,
                     content::PageImportanceSignals)
 
+// This message is sent from a RenderFrameProxy when sequential focus
+// navigation needs to advance into its actual frame.  |source_routing_id|
+// identifies the frame that issued this request.  This is used when pressing
+// <tab> or <shift-tab> hits an out-of-process iframe when searching for the
+// next focusable element.
+IPC_MESSAGE_ROUTED2(FrameHostMsg_AdvanceFocus,
+                    blink::WebFocusType /* type */,
+                    int /* source_routing_id */)
+
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 
 // Message to show/hide a popup menu using native controls.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.