[heap] Move RegExpResultCache out of the heap.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 415e7d0c5ee569ea458263beb294efc1245cead9..33cb0498f3a174c4fc6e0a2da2c303fddc0ce321 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -2643,30 +2643,6 @@ class DescriptorLookupCache {
 };
 
 
-class RegExpResultsCache {
- public:
-  enum ResultsCacheType { REGEXP_MULTIPLE_INDICES, STRING_SPLIT_SUBSTRINGS };
-
-  // Attempt to retrieve a cached result.  On failure, 0 is returned as a Smi.
-  // On success, the returned result is guaranteed to be a COW-array.
-  static Object* Lookup(Heap* heap, String* key_string, Object* key_pattern,
-                        ResultsCacheType type);
-  // Attempt to add value_array to the cache specified by type.  On success,
-  // value_array is turned into a COW-array.
-  static void Enter(Isolate* isolate, Handle<String> key_string,
-                    Handle<Object> key_pattern, Handle<FixedArray> value_array,
-                    ResultsCacheType type);
-  static void Clear(FixedArray* cache);
-  static const int kRegExpResultsCacheSize = 0x100;
-
- private:
-  static const int kArrayEntriesPerCacheEntry = 4;
-  static const int kStringOffset = 0;
-  static const int kPatternOffset = 1;
-  static const int kArrayOffset = 2;
-};
-
-
 // Abstract base class for checking whether a weak object should be retained.
 class WeakObjectRetainer {
  public: