Make ResourceScheduler work in 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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 1087 matching lines @@
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeSandboxFlags,
                     int32_t /* subframe_routing_id */,
                     blink::WebSandboxFlags /* updated_flags */)
 
 // Notifies the browser that frame owner properties have changed for a subframe
 // of this frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeFrameOwnerProperties,
                     int32_t /* subframe_routing_id */,
                     content::FrameOwnerProperties /* frame_owner_properties */)
 
+// Notifies the browser that document has parsed the body. This is used by the
+// ResourceScheduler as an indication that bandwidth contention won't block
+// first paint.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_WillInsertBody,
+                    int /* render_view_routing_id */)
+
 // Changes the title for the page in the UI when the page is navigated or the
 // title changes. Sent for top-level frames.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_UpdateTitle,
                     base::string16 /* title */,
                     blink::WebTextDirection /* title direction */)
 
 // Change the encoding name of the page in UI when the page has detected
 // proper encoding name. Sent for top-level frames.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_UpdateEncoding,
                     std::string /* new encoding name */)
@@ skipping 439 matching lines @@
 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #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.