Log messages regarding why app banners aren't displayed to the console

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index c9218057d0217d1f6f6589c46b272a6c6046c699..fe1a755e389c400367cd22520882334242994c04 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -453,6 +453,11 @@ IPC_MESSAGE_ROUTED2(ChromeViewMsg_AppBannerPromptRequest,
                     int /* request_id */,
                     std::string /* platform */)
 
+// Asks the renderer to log a debug message to console regarding a
+// non-displayed app banner

[benwells, 2015/05/07 01:57:20]

Nit: techincally this is incorrect as we also log a message for banners that are
shown. Maybe just '... regarding app banners.'

[dominickn (DO NOT USE), 2015/05/07 05:37:24]

Done.

+IPC_MESSAGE_ROUTED1(ChromeViewMsg_AppBannerDebugMessageRequest,
+                    std::string /* message */)
+
 // Notification that the page has an OpenSearch description document
 // associated with it.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_PageHasOSDD,