Fix gcc-4.6 warnings.

test/cctest/test-deoptimization.cc

 // Copyright 2007-2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 219 matching lines @@
         "function f(x) { calls++; if (x > 0) { f(x - 1); } else { g(); } };"
         "f(10); gc(); gc()");
   }
 
   CHECK_EQ(1, env->Global()->Get(v8_str("count"))->Int32Value());
   CHECK_EQ(11, env->Global()->Get(v8_str("calls"))->Int32Value());
   CHECK_EQ(0, Deoptimizer::GetDeoptimizedCodeCount(Isolate::Current()));
 
   v8::Local<v8::Function> fun =
       v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("f")));
-  Handle<v8::internal::JSFunction> f = v8::Utils::OpenHandle(*fun);
+  Handle<v8::internal::JSFunction> f(v8::Utils::OpenHandle(*fun));
 }
 
 
 TEST(DeoptimizeMultiple) {
   v8::HandleScope scope;
   const char* extension_list[] = { "v8/gc" };
   v8::ExtensionConfiguration extensions(1, extension_list);
   LocalContext env(&extensions);
 
   {
@@ skipping 455 matching lines @@
   }
 
   CHECK(!GetJSFunction(env->Global(), "f1")->IsOptimized());
   CHECK(!GetJSFunction(env->Global(), "g1")->IsOptimized());
   CHECK(!GetJSFunction(env->Global(), "f2")->IsOptimized());
   CHECK(!GetJSFunction(env->Global(), "g2")->IsOptimized());
   CHECK_EQ(1, env->Global()->Get(v8_str("count"))->Int32Value());
   CHECK_EQ(13, env->Global()->Get(v8_str("result"))->Int32Value());
   CHECK_EQ(0, Deoptimizer::GetDeoptimizedCodeCount(Isolate::Current()));
 }