Update V8 to r6101 as required by WebKit r74534

Change-Id: I7f84af8dd732f11898fd644b2c2b1538914cb78d
diff --git a/src/compilation-cache.h b/src/compilation-cache.h
index 22ecff8..37e21be 100644
--- a/src/compilation-cache.h
+++ b/src/compilation-cache.h
@@ -76,9 +76,20 @@
                         JSRegExp::Flags flags,
                         Handle<FixedArray> data);
 
+  // Support for eager optimization tracking.
+  static bool ShouldOptimizeEagerly(Handle<JSFunction> function);
+  static void MarkForEagerOptimizing(Handle<JSFunction> function);
+  static void MarkForLazyOptimizing(Handle<JSFunction> function);
+
+  // Reset the eager optimization tracking data.
+  static void ResetEagerOptimizingData();
+
   // Clear the cache - also used to initialize the cache at startup.
   static void Clear();
 
+  // Remove given shared function info from all caches.
+  static void Remove(Handle<SharedFunctionInfo> function_info);
+
   // GC support.
   static void Iterate(ObjectVisitor* v);
   static void IterateFunctions(ObjectVisitor* v);