Create optimized versions of the Map/Set clear method

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2416 matching lines @@
   template <typename CollectionType>
   HValue* BuildOrderedHashTableFindEntry(HValue* table, HValue* key,
                                          HValue* hash);
   template <typename CollectionType>
   HValue* BuildOrderedHashTableAddEntry(HValue* table, HValue* key,
                                         HValue* hash,
                                         HIfContinuation* join_continuation);
   template <typename CollectionType>
   HValue* BuildAllocateOrderedHashTable();
   template <typename CollectionType>
+  void BuildOrderedHashTableClear(HValue* receiver);
+  template <typename CollectionType>
   void BuildJSCollectionDelete(CallRuntime* call,
                                const Runtime::Function* c_function);
   template <typename CollectionType>
   void BuildJSCollectionHas(CallRuntime* call,
                             const Runtime::Function* c_function);
   HValue* BuildStringHashLoadIfIsStringAndHashComputed(
       HValue* object, HIfContinuation* continuation);
 
   Handle<JSFunction> array_function() {
     return handle(isolate()->native_context()->array_function());
@@ skipping 493 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_