No implicit conversion between a Foo** and a Handle<Foo>.

Review URL: http://codereview.chromium.org/1861001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4561 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/handles.h

@@ -42,7 +42,7 @@ namespace internal {
 template<class T>
 class Handle {
  public:
-  INLINE(Handle(T** location)) { location_ = location; }
+  INLINE(explicit Handle(T** location)) { location_ = location; }
   INLINE(explicit Handle(T* obj));
 
   INLINE(Handle()) : location_(NULL) {}

src/x64/assembler-x64.cc

@@ -116,8 +116,10 @@ void CpuFeatures::Probe()  {
 
   CodeDesc desc;
   assm.GetCode(&desc);
-  Object* code =
-      Heap::CreateCode(desc, NULL, Code::ComputeFlags(Code::STUB), NULL);
+  Object* code = Heap::CreateCode(desc,
+                                  NULL,
+                                  Code::ComputeFlags(Code::STUB),
+                                  Handle<Object>());
   if (!code->IsCode()) return;
   PROFILE(CodeCreateEvent(Logger::BUILTIN_TAG,
                           Code::cast(code), "CpuFeatures::Probe"));