PlzNavigate: Show error pages when the navigation failed before commit

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 8a4fb0c3d2a45029db222d5bfa051d74aeb36b09..8feb8b56d06ad1dee4196cae6b1aa95ef8a0410e 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -533,6 +533,15 @@ IPC_MESSAGE_ROUTED4(FrameMsg_CommitNavigation,
                     content::CommonNavigationParams, /* common_params */
                     content::RequestNavigationParams /* request_params */)
 
+// 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 */)

[Charlie Reis, 2015/04/09 00:07:30]

Shouldn't this comment line up with the others, as in request_params on the
struct above?  Or we could match the other structs where the comments aren't
lined up.  Let's pick one or the other, though.

[clamy, 2015/04/10 14:04:49]

Done. Weirdly this is produced by git cl format.

+
 #if defined(ENABLE_PLUGINS)
 // Notifies the renderer of updates to the Plugin Power Saver origin whitelist.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdatePluginContentOriginWhitelist,