MIPS: Turn Load/StoreGlobal into a handler.

Port r17550 (3e0015e)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/60733010

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17573 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/stub-cache-mips.cc

@@ -3032,10 +3032,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
     bool is_dont_delete) {
   Label success, miss;
 
-  __ CheckMap(
-      receiver(), scratch1(), Handle<Map>(object->map()), &miss, DO_SMI_CHECK);
-  HandlerFrontendHeader(
-      object, receiver(), Handle<JSObject>::cast(global), name, &miss);
+  HandlerFrontendHeader(object, receiver(), global, name, &miss);
 
   // Get the value from the cell.
   __ li(a3, Operand(cell));
@@ -3056,7 +3053,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
   __ mov(v0, t0);
 
   // Return the generated code.
-  return GetICCode(kind(), Code::NORMAL, name);
+  return GetCode(kind(), Code::NORMAL, name);
 }