OOPIF: Handle cross-site frames being blocked by X-Frame-Options or CSP.

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 828 matching lines @@
 // Serialize target frame and its resources into MHTML and write it into the
 // provided destination file handle.  Note that when serializing multiple
 // frames, one needs to serialize the *main* frame first (the main frame
 // needs to go first according to RFC2557 + the main frame will trigger
 // generation of the MHTML header).
 IPC_MESSAGE_ROUTED1(FrameMsg_SerializeAsMHTML, FrameMsg_SerializeAsMHTML_Params)
 
 IPC_MESSAGE_ROUTED1(FrameMsg_SetFrameOwnerProperties,
                     blink::WebFrameOwnerProperties /* frame_owner_properties */)
 
+// Notifies the frame that its load was blocked while loading.  This is
+// currently used by X-Frame-Options or CSP frame-ancestors.  The frame uses
+// this to perform some special processing (setting its origin to unique,
+// dispatching a load event on the frame's owner) so that one can't tell
+// whether this load was blocked or not.
+IPC_MESSAGE_ROUTED0(FrameMsg_BlockedLoad)
+
 // 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 */,
                     int32_t /* source_routing_id */)
 
 // Sent when the user wants to search for a word on the page (find-in-page).
 IPC_MESSAGE_ROUTED3(FrameMsg_Find,
@@ skipping 129 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 */,
                     blink::WebFrameOwnerProperties /* frame_owner_properties */)
 
+// Notifies the browser process that a subframe was blocked by
+// X-Frame-Options or CSP frame-ancestors while loading.
+//
+// TODO(mkwst, alexmos): This will become unnecessary once X-Frame-Options and
+// CSP enforcement moves to the browser process (https://crbug.com/555418).
+IPC_MESSAGE_ROUTED0(FrameHostMsg_BlockedLoad)
+
 // 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 430 matching lines @@
 IPC_MESSAGE_ROUTED3(FrameHostMsg_FindMatchRects_Reply,
                     int /* version */,
                     std::vector<gfx::RectF> /* rects */,
                     gfx::RectF /* active_rect */)
 #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.