Move RMA::Label out of the class, so it can be forward declared.

test/cctest/compiler/test-run-native-calls.cc

 // Copyright 2015 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.
 
 // TODO(jochen): Remove this after the setting is turned on globally.
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include "src/assembler.h"
 #include "src/codegen.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-type.h"
 #include "src/compiler/raw-machine-assembler.h"
 #include "src/register-configuration.h"
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
 #include "test/cctest/compiler/graph-builder-tester.h"
 #include "test/cctest/compiler/value-helper.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-typedef RawMachineAssembler::Label MLabel;
-
 #if V8_TARGET_ARCH_ARM64
 // TODO(titzer): fix native stack parameters on arm64
 #define DISABLE_NATIVE_STACK_PARAMS true
 #else
 #define DISABLE_NATIVE_STACK_PARAMS false
 #endif
 
 namespace {
 typedef float float32;
 typedef double float64;
@@ skipping 1128 matching lines @@
 
 
 TEST(MixedParams_0) { MixedParamTest(0); }
 TEST(MixedParams_1) { MixedParamTest(1); }
 TEST(MixedParams_2) { MixedParamTest(2); }
 TEST(MixedParams_3) { MixedParamTest(3); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8