Styles pane is made work with IPC. Still not work and will be fixed later:...

webkit/glue/devtools/dom_agent.h

Index: webkit/glue/devtools/dom_agent.h
===================================================================
--- webkit/glue/devtools/dom_agent.h	(revision 13008)
+++ webkit/glue/devtools/dom_agent.h	(working copy)
@@ -33,6 +33,10 @@
   /* Perform search. */ \
   METHOD2(PerformSearch, int /* call_id */, String /* query */) \
   \
+  /* Requests that the element's style information is sent to the client. */ \
+  METHOD3(GetNodeStyles, int /* call_id */, int /* id */,\
+      bool /* author_only */) \
+  \
   /* Tells dom agent that the client has lost all of the dom-related
    information and is no longer interested in the notifications related to the
    nodes issued earlier. */ \
@@ -48,6 +52,9 @@
   /* Perform search. */ \
   METHOD2(DidPerformSearch, int /* call_id */, Value /* results */) \
   \
+  /* Response to GetNodeStyles. */ \
+  METHOD2(DidGetNodeStyles, int /* call_id */, Value /* styles */) \
+  \
   /* Ack for the Set/RemoveAttribute, SetTextNodeValue. */ \
   METHOD2(DidApplyDomChange, int /* call_id */, bool /* success */) \
   \