Fixed a few space leaks.

src/compiler/instruction.cc

 // Copyright 2014 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/compiler/instruction.h"
 
 #include "src/compiler/common-operator.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 432 matching lines @@
       if (phi->opcode() != IrOpcode::kPhi) continue;
       os << "     phi: v" << phi->id() << " =";
       Node::Inputs inputs = phi->inputs();
       for (Node::Inputs::iterator iter(inputs.begin()); iter != inputs.end();
            ++iter) {
         os << " v" << (*iter)->id();
       }
       os << "\n";
     }
 
-    Vector<char> buf = Vector<char>::New(32);
+    ScopedVector<char> buf(32);
     for (int j = block->first_instruction_index();
          j <= block->last_instruction_index(); j++) {
       // TODO(svenpanne) Add some basic formatting to our streams.
       SNPrintF(buf, "%5d", j);
       os << "   " << buf.start() << ": " << *code.InstructionAt(j);
     }
 
     os << "  " << block->control_;
 
     if (block->control_input_ != NULL) {
       os << " v" << block->control_input_->id();
     }
 
     BasicBlock::Successors successors = block->successors();
     for (BasicBlock::Successors::iterator iter = successors.begin();
          iter != successors.end(); ++iter) {
       os << " B" << (*iter)->id();
     }
     os << "\n";
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8