MIPS: port Moved random generator state to global context.

Port r9753 (28cd67f8)

BUG=
TEST=

Review URL: http://codereview.chromium.org/8390032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9786 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/full-codegen-mips.cc

@@ -2866,7 +2866,7 @@ void FullCodeGenerator::EmitRandomHeapNumber(ZoneList<Expression*>* args) {
   if (CpuFeatures::IsSupported(FPU)) {
     __ PrepareCallCFunction(1, a0);
     __ lw(a0, ContextOperand(cp, Context::GLOBAL_INDEX));
-    __ lw(a0, FieldOperand(a0, GlobalObject::kGlobalContextOffset));
+    __ lw(a0, FieldMemOperand(a0, GlobalObject::kGlobalContextOffset));
     __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
 
 
@@ -2885,7 +2885,7 @@ void FullCodeGenerator::EmitRandomHeapNumber(ZoneList<Expression*>* args) {
     __ PrepareCallCFunction(2, a0);
     __ mov(a0, s0);
     __ lw(a1, ContextOperand(cp, Context::GLOBAL_INDEX));
-    __ lw(a1, FieldOperand(a1, GlobalObject::kGlobalContextOffset));
+    __ lw(a1, FieldMemOperand(a1, GlobalObject::kGlobalContextOffset));
     __ CallCFunction(
         ExternalReference::fill_heap_number_with_random_function(isolate()), 2);
   }