Try to make the contextuality check in the IC code faster...

bleeding_edge/src/ic.h

Index: bleeding_edge/src/ic.h
===================================================================
--- bleeding_edge/src/ic.h	(revision 3458)
+++ bleeding_edge/src/ic.h	(working copy)
@@ -104,7 +104,16 @@
 
   // Returns if this IC is for contextual (no explicit receiver)
   // access to properties.
-  bool is_contextual() {
+  bool IsContextual(Handle<Object> receiver) {
+    if (receiver->IsGlobalObject()) {
+      return SlowIsContextual();
+    } else {
+      ASSERT(!SlowIsContextual());
+      return false;
+    }
+  }
+
+  bool SlowIsContextual() {
     return ComputeMode() == RelocInfo::CODE_TARGET_CONTEXT;
   }