Fix and re-enable test-api/InitializeAndDispose.

src/lithium.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/lithium.h"
 #include "src/scopes.h"
 #include "src/serialize.h"
 
@@ skipping 127 matching lines @@
   cache = new LSubKindOperand[kNumCachedOperands];
   for (int i = 0; i < kNumCachedOperands; i++) {
     cache[i].ConvertTo(kOperandKind, i);
   }
 }
 
 
 template<LOperand::Kind kOperandKind, int kNumCachedOperands>
 void LSubKindOperand<kOperandKind, kNumCachedOperands>::TearDownCache() {
   delete[] cache;
+  cache = NULL;
 }
 
 
 void LOperand::SetUpCaches() {
 #define LITHIUM_OPERAND_SETUP(name, type, number) L##name::SetUpCache();
   LITHIUM_OPERAND_LIST(LITHIUM_OPERAND_SETUP)
 #undef LITHIUM_OPERAND_SETUP
 }
 
 
@@ skipping 484 matching lines @@
 
 
 LPhase::~LPhase() {
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceLithium(name(), chunk_);
   }
 }
 
 
 } }  // namespace v8::internal