PlzNavigate: Invoke didFailProvisionalLoad() in the renderer when a navigation request is cancelled…

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 784 matching lines @@
 // Sent for top-level frames.
 IPC_MESSAGE_ROUTED1(FrameMsg_SetTextTrackSettings,
                     FrameMsg_TextTrackSettings_Params /* params */)
 
 // Posts a message from a frame in another process to the current renderer.
 IPC_MESSAGE_ROUTED1(FrameMsg_PostMessageEvent, FrameMsg_PostMessage_Params)
 
 // Tells the RenderFrame to clear the focused element (if any).
 IPC_MESSAGE_ROUTED0(FrameMsg_ClearFocusedElement)
 
+// PlzNavigate
+// Tells the renderer that the navigation request was aborted.
+IPC_MESSAGE_ROUTED2(FrameMsg_AbortNavigationRequest,
+                    GURL /* url */,
+                    int /* error code */)
+
 #if defined(OS_ANDROID)
 // Request the distance to the nearest find result in a frame from the point at
 // (x, y), defined in fractions of the content document's width and height. The
 // distance will be returned via FrameHostMsg_GetNearestFindResult_Reply.  Note
 // that |nfr_request_id| is a completely seperate ID from the |request_id| used
 // in other find-related IPCs. It is specifically used to uniquely identify a
 // nearest find result request, rather than a find request.
 IPC_MESSAGE_ROUTED3(FrameMsg_GetNearestFindResult,
                     int /* nfr_request_id */,
                     float /* x */,
@@ skipping 750 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.