PlzNavigate: stop navigations when opening a document for write

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 353 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(headers)
   IPC_STRUCT_TRAITS_MEMBER(load_flags)
   IPC_STRUCT_TRAITS_MEMBER(has_user_gesture)
   IPC_STRUCT_TRAITS_MEMBER(skip_service_worker)
   IPC_STRUCT_TRAITS_MEMBER(request_context_type)
   IPC_STRUCT_TRAITS_MEMBER(mixed_content_context_type)
   IPC_STRUCT_TRAITS_MEMBER(searchable_form_url)
   IPC_STRUCT_TRAITS_MEMBER(searchable_form_encoding)
   IPC_STRUCT_TRAITS_MEMBER(initiator_origin)
   IPC_STRUCT_TRAITS_MEMBER(client_side_redirect_url)
+  IPC_STRUCT_TRAITS_MEMBER(renderer_navigation_id)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::StartNavigationParams)
   IPC_STRUCT_TRAITS_MEMBER(extra_headers)
   IPC_STRUCT_TRAITS_MEMBER(transferred_request_child_id)
   IPC_STRUCT_TRAITS_MEMBER(transferred_request_request_id)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::NavigationTiming)
   IPC_STRUCT_TRAITS_MEMBER(redirect_start)
@@ skipping 514 matching lines @@
 // Tells the renderer that a navigation is ready to commit.  The renderer should
 // request |stream_url| to get access to the stream containing the body of the
 // response.
 IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
                     content::ResourceResponseHead,    /* response */
                     GURL,                             /* stream_url */
                     content::CommonNavigationParams,  /* common_params */
                     content::RequestNavigationParams  /* request_params */)
 
 // PlzNavigate
+// Informs the renderer that the browser stopped processing a renderer-initiated
+// navigation.
+IPC_MESSAGE_ROUTED1(FrameMsg_DroppedNavigation,

[Charlie Reis, 2017/03/20 06:34:44]

We seem to be a bit inconsistent with calling this dropped, stopped, ignored, or
canceled.  (Also aborted, but maybe that's always the other direction?)  Since
we know it needs to be differentiated from failed, maybe we should pick one term
and use it consistently?

+                    int /* renderer_navigation_id */)
+
+// PlzNavigate
 // Tells the renderer that a navigation failed with the error code |error_code|
 // and that the renderer should display an appropriate error page.
 IPC_MESSAGE_ROUTED4(FrameMsg_FailedNavigation,
                     content::CommonNavigationParams,  /* common_params */
                     content::RequestNavigationParams, /* request_params */
                     bool,                             /* stale_copy_in_cache */
                     int                               /* error_code */)
 
 // PlzNavigate
 // Tells the renderer that a navigation was blocked because a content security
@@ skipping 580 matching lines @@
                     std::string /* http method */,
                     std::string /* mime type */,
                     content::ResourceType /* resource type */)
 
 // PlzNavigate
 // Tells the browser to perform a navigation.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_BeginNavigation,
                     content::CommonNavigationParams,
                     content::BeginNavigationParams)
 
+// PlzNavigate
+// Tells the browser to abort an ongoing renderer-initiated navigation. This is
+// used when the page calls document.open.
+IPC_MESSAGE_ROUTED0(FrameHostMsg_AbortNavigation)
+
 // Sent as a response to FrameMsg_VisualStateRequest.
 // The message is delivered using RenderWidget::QueueMessage.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_VisualStateResponse, uint64_t /* id */)
 
 // Reply to the ExtractSmartClipData message.
 IPC_MESSAGE_ROUTED3(FrameHostMsg_SmartClipDataExtracted,
                     uint32_t /* id */,
                     base::string16 /* text */,
                     base::string16 /* html */)
 
@@ skipping 121 matching lines @@
                     int /* nfr_request_id */,
                     float /* distance */)
 
 IPC_MESSAGE_ROUTED0(FrameHostMsg_NavigationHandledByEmbedder)
 #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.