StubCallInterfaceDescriptor takes a context register.

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arm/lithium-codegen-arm.h"
 #include "src/arm/lithium-gap-resolver-arm.h"
 #include "src/code-stubs.h"
 #include "src/hydrogen-osr.h"
@@ skipping 3952 matching lines @@
 void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) {
   ASSERT(ToRegister(instr->result()).is(r0));
 
   LPointerMap* pointers = instr->pointer_map();
   SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
 
   if (instr->target()->IsConstantOperand()) {
     LConstantOperand* target = LConstantOperand::cast(instr->target());
     Handle<Code> code = Handle<Code>::cast(ToHandle(target));
     generator.BeforeCall(__ CallSize(code, RelocInfo::CODE_TARGET));
-    PlatformCallInterfaceDescriptor* call_descriptor =
+    PlatformInterfaceDescriptor* call_descriptor =
         instr->descriptor()->platform_specific_descriptor();
     __ Call(code, RelocInfo::CODE_TARGET, TypeFeedbackId::None(), al,
             call_descriptor->storage_mode());
   } else {
     ASSERT(instr->target()->IsRegister());
     Register target = ToRegister(instr->target());
     generator.BeforeCall(__ CallSize(target));
     // Make sure we don't emit any additional entries in the constant pool
     // before the call to ensure that the CallCodeSize() calculated the correct
     // number of instructions for the constant pool load.
@@ skipping 1895 matching lines @@
   __ Push(scope_info);
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal