Restore in-memory parser cache for V8 compile.

Source/core/fetch/Resource.h

Index: Source/core/fetch/Resource.h
diff --git a/Source/core/fetch/Resource.h b/Source/core/fetch/Resource.h
index 157443890a34ee531010746355a4e7689b130fc3..5434fba7a36338411102497995c75d0b60024c4f 100644
--- a/Source/core/fetch/Resource.h
+++ b/Source/core/fetch/Resource.h
@@ -82,6 +82,11 @@ public:
         DecodeError
     };
 
+    enum MetadataCacheType {
+        SendToPlatform, // send cache data to blink::Platform::cacheMetadata
+        CacheLocally // cache only in Resource's member variables
+    };
+
     Resource(const ResourceRequest&, Type);
 #if ENABLE(OILPAN)
     virtual ~Resource();
@@ -195,7 +200,7 @@ public:
     // Caches the given metadata in association with this resource and suggests
     // that the platform persist it. The dataTypeID is a pseudo-randomly chosen
     // identifier that is used to distinguish data generated by the caller.
-    void setCachedMetadata(unsigned dataTypeID, const char*, size_t);
+    void setCachedMetadata(unsigned dataTypeID, const char*, size_t, MetadataCacheType = SendToPlatform);
 
     // Reset existing metadata, to allow setting new data.
     void clearCachedMetadata();