Add error description to the DidFailProvisionalLoad callback.

content/common/view_messages.h

 // Copyright (c) 2011 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 page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 533 matching lines @@
   //   ViewHostMsg_UpdateRect_Flags::IS_REPAINT_ACK
   //     Indicates that this is a response to a ViewMsg_Repaint message.
   //
   // If flags is zero, then this message corresponds to an unsolicited paint
   // request by the render view.  Any of the above bits may be set in flags,
   // which would indicate that this paint message is an ACK for multiple
   // request messages.
   IPC_STRUCT_MEMBER(int, flags)
 IPC_STRUCT_END()
 
+IPC_STRUCT_BEGIN(ViewHostMsg_DidFailProvisionalLoadWithError_Params)
+  // The frame ID for the failure report.
+  IPC_STRUCT_MEMBER(int64, frame_id)
+  // True if this is the top-most frame.
+  IPC_STRUCT_MEMBER(bool, is_main_frame)
+  // Error code as reported in the DidFailProvisionalLoad callback.
+  IPC_STRUCT_MEMBER(int, error_code)
+  // An error message generated from the error_code. This can be an empty
+  // string if we were unable to find a meaningful description.
+  IPC_STRUCT_MEMBER(string16, error_description)
+  // The URL that the error is reported for.
+  IPC_STRUCT_MEMBER(GURL, url)
+  // True if the failure is the result of navigating to a POST again
+  // and we're going to show the POST interstitial.
+  IPC_STRUCT_MEMBER(bool, showing_repost_interstitial)
+IPC_STRUCT_END()
+
 IPC_STRUCT_BEGIN(ViewMsg_SwapOut_Params)
   // The identifier of the RenderProcessHost for the currently closing view.
   //
   // These first two parameters are technically redundant since they are
   // needed only when processing the ACK message, and the processor
   // theoretically knows both the process and route ID. However, this is
   // difficult to figure out with our current implementation, so this
   // information is duplicated here.
   IPC_STRUCT_MEMBER(int, closing_process_id)
 
@@ skipping 798 matching lines @@
                     GURL         /* target URL */)
 
 // Sent when the renderer starts a provisional load for a frame.
 IPC_MESSAGE_ROUTED4(ViewHostMsg_DidStartProvisionalLoadForFrame,
                     int64 /* frame_id */,
                     bool /* true if it is the main frame */,
                     GURL /* opener url if present, else empty */,
                     GURL /* url */)
 
 // Sent when the renderer fails a provisional load with an error.
-IPC_MESSAGE_ROUTED5(ViewHostMsg_DidFailProvisionalLoadWithError,
-                    int64 /* frame_id */,
-                    bool /* true if it is the main frame */,
-                    int /* error_code */,
-                    GURL /* url */,
-                    bool /* true if the failure is the result of
-                            navigating to a POST again and we're going to
-                            show the POST interstitial */)
+IPC_MESSAGE_ROUTED1(ViewHostMsg_DidFailProvisionalLoadWithError,
+                    ViewHostMsg_DidFailProvisionalLoadWithError_Params)
+
 
 // Tells the render view that a ViewHostMsg_PaintAtSize message was
 // processed, and the DIB is ready for use. |tag| has the same value that
 // the tag sent along with ViewMsg_PaintAtSize.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_PaintAtSize_ACK,
                     int /* tag */,
                     gfx::Size /* size */)
 
 // Sent to update part of the view.  In response to this message, the host
 // generates a ViewMsg_UpdateRect_ACK message.
@@ skipping 544 matching lines @@
                      media::MediaLogEvent /* event */)
 
 // Requests to lock the mouse. Will result in a ViewMsg_LockMouse_ACK message
 // being sent back.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_LockMouse)
 
 // Requests to unlock the mouse. A ViewMsg_MouseLockLost message will be sent
 // whenever the mouse is unlocked (which may or may not be caused by
 // ViewHostMsg_UnlockMouse).
 IPC_MESSAGE_ROUTED0(ViewHostMsg_UnlockMouse)
-