Add experimental v8 code cache options.

Source/bindings/core/v8/V8CacheOptions.h

Index: Source/bindings/core/v8/V8CacheOptions.h
diff --git a/Source/bindings/core/v8/V8CacheOptions.h b/Source/bindings/core/v8/V8CacheOptions.h
index 3e702232d644387715740a2aa4d4e4ad0a1f4774..7f043bb0a459db12ae8da02a74c5655584be66b3 100644
--- a/Source/bindings/core/v8/V8CacheOptions.h
+++ b/Source/bindings/core/v8/V8CacheOptions.h
@@ -41,7 +41,11 @@ enum V8CacheOptions {
     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