Browser plugin: Implement loadStart and loadAbort events

content/common/browser_plugin_messages.h

Index: content/common/browser_plugin_messages.h
diff --git a/content/common/browser_plugin_messages.h b/content/common/browser_plugin_messages.h
index 563684b4b10e63ed842fbd17dfc4ae0364ce6d7f..88bc4605e0b427267559a9247e7b53267bcc431a 100644
--- a/content/common/browser_plugin_messages.h
+++ b/content/common/browser_plugin_messages.h
@@ -125,6 +125,22 @@ IPC_SYNC_MESSAGE_ROUTED2_0(BrowserPluginHostMsg_ResizeGuest,
 // -----------------------------------------------------------------------------
 // These messages are from the browser process to the embedder.
 
+// When the guest begins to load a page, the browser process informs the
+// embedder through the BrowserPluginMsg_LoadStart message.
+IPC_MESSAGE_CONTROL3(BrowserPluginMsg_LoadStart,
+                     int /* instance_id */,
+                     GURL /* url */,
+                     bool /* is_top_level */)
+
+// If the guest fails to commit a page load then it will inform the
+// embedder through the BrowserPluginMsg_LoadAbort. A description
+// of the error will be stored in type.

[Charlie Reis, 2012/10/04 02:57:48]

I think we want this to be one of a set of known error types, so that developers
can compare against it.
nit: |type|

[Fady Samuel, 2012/10/04 15:04:51]

Done.

+IPC_MESSAGE_CONTROL4(BrowserPluginMsg_LoadAbort,
+                     int /* instance_id */,
+                     GURL /* url */,
+                     bool /* is_top_level */,
+                     std::string /* type */)
+
 // When the guest navigates, the browser process informs the embedder through
 // the BrowserPluginMsg_DidNavigate message.
 IPC_MESSAGE_CONTROL3(BrowserPluginMsg_DidNavigate,