Load the global proxy from the context of the target function.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index ade69286c8446405e8f9a39fe0beebf8721ba3f1..c42936d0544b82e57bc36e73a6a12ae63c919ade 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -3494,9 +3494,8 @@ void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
   __ b(&result_in_receiver);
 
   __ bind(&global_object);
-  __ ldr(result, GlobalObjectOperand());
-  __ ldr(result,
-         FieldMemOperand(result, JSGlobalObject::kGlobalReceiverOffset));
+  CallStubCompiler::FetchGlobalProxy(masm(), receiver, function);
+
   if (result.is(receiver)) {
     __ bind(&result_in_receiver);
   } else {
@@ -3994,7 +3993,10 @@ void LCodeGen::DoCallFunction(LCallFunction* instr) {
   ASSERT(ToRegister(instr->result()).is(r0));
 
   int arity = instr->arity();
-  CallFunctionStub stub(arity, NO_CALL_FUNCTION_FLAGS);
+  CallFunctionFlags flags =
+      instr->hydrogen()->IsContextualCall() ?
+          RECEIVER_IS_IMPLICIT : NO_CALL_FUNCTION_FLAGS;
+  CallFunctionStub stub(arity, flags);
   if (instr->hydrogen()->IsTailCall()) {
     if (NeedsEagerFrame()) __ mov(sp, fp);
     __ Jump(stub.GetCode(isolate()), RelocInfo::CODE_TARGET);