Add experimental v8 code cache options.

Source/bindings/core/v8/V8CacheOptions.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 namespace blink {
 
 enum V8CacheOptions {
     V8CacheOptionsDefault, // Use whatever the current default is.
     V8CacheOptionsParse, // Use parser caching.
     V8CacheOptionsCode, // Use code caching.
     V8CacheOptionsCodeCompressed, // Use code caching and compress the code.
     V8CacheOptionsNone, // V8 caching turned off.
     V8CacheOptionsParseMemory, // Use parser in-memory caching (no disk).
     V8CacheOptionsHeuristics, // Mixed strategy: Cache code if it's a likely win.
-    V8CacheOptionsHeuristicsMobile // As above, but tuned for mobile.
+    V8CacheOptionsHeuristicsMobile, // As above, but tuned for mobile.
+    V8CacheOptionsHeuristicsDefault, // Cache code or default.
+    V8CacheOptionsHeuristicsDefaultMobile, // As above, but tuned for mobile.
+    V8CacheOptionsRecent, // Cache recently compiled code.
+    V8CacheOptionsRecentSmall // Cache small recently compiled code.
 };
 
 } // namespace blink
 
 #endif // V8CacheOptions_h