Convert tabs, windows, and extension APIs to feature system.

chrome/common/extensions/extension_messages.h

Index: chrome/common/extensions/extension_messages.h
diff --git a/chrome/common/extensions/extension_messages.h b/chrome/common/extensions/extension_messages.h
index 35031616de69025fb4e04a950f12e75ae6cb15d0..fe5c9985f929d0a5c19591de25a838540108eb20 100644
--- a/chrome/common/extensions/extension_messages.h
+++ b/chrome/common/extensions/extension_messages.h
@@ -39,6 +39,9 @@ IPC_STRUCT_BEGIN(ExtensionHostMsg_Request_Params)
   // Web security origin of the frame the request was sent from.
   IPC_STRUCT_MEMBER(string16, source_origin)
 
+  // The Feature::Context type this request came from.
+  IPC_STRUCT_MEMBER(int, source_context_type)
+
   // Unique request id to match requests and responses.
   IPC_STRUCT_MEMBER(int, request_id)
 
@@ -300,9 +303,10 @@ IPC_MESSAGE_CONTROL2(ExtensionHostMsg_RequestForIOThread,
                      ExtensionHostMsg_Request_Params)
 
 // Notify the browser that the given extension added a listener to an event.
-IPC_MESSAGE_CONTROL2(ExtensionHostMsg_AddListener,
+IPC_MESSAGE_CONTROL3(ExtensionHostMsg_AddListener,
                      std::string /* extension_id */,
-                     std::string /* name */)
+                     std::string /* name */,
+                     int /* source_context_type */)
 
 // Notify the browser that the given extension removed a listener from an
 // event.
@@ -312,9 +316,10 @@ IPC_MESSAGE_CONTROL2(ExtensionHostMsg_RemoveListener,
 
 // Notify the browser that the given extension added a listener to an event from
 // a lazy background page.
-IPC_MESSAGE_CONTROL2(ExtensionHostMsg_AddLazyListener,
+IPC_MESSAGE_CONTROL3(ExtensionHostMsg_AddLazyListener,
                      std::string /* extension_id */,
-                     std::string /* name */)
+                     std::string /* name */,
+                     int /* source_context_type */)
 
 // Notify the browser that the given extension is no longer interested in
 // receiving the given event from a lazy background page.