Enables stack frame vm tests on MIPS.

runtime/vm/stack_frame_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/resolver.h"
 #include "vm/stack_frame.h"
 #include "vm/unit_test.h"
 #include "vm/verifier.h"
 #include "vm/zone.h"
 
 namespace dart {
 
-// Only ia32, x64, and arm can run stack frame iteration tests.
-#if defined(TARGET_ARCH_IA32) ||                                               \
-    defined(TARGET_ARCH_X64) ||                                                \
-    defined(TARGET_ARCH_ARM)
-
 // Unit test for empty stack frame iteration.
 TEST_CASE(EmptyStackFrameIteration) {
   StackFrameIterator iterator(StackFrameIterator::kValidateFrames);
   EXPECT(!iterator.HasNextFrame());
   EXPECT(iterator.NextFrame() == NULL);
   VerifyPointersVisitor::VerifyPointers();
 }
 
 
 // Unit test for empty dart stack frame iteration.
@@ skipping 249 matching lines @@
       "    StackFrame.equals(5, obj.foo(101, 202));"
       "  }"
       "}";
   Dart_Handle lib = TestCase::LoadTestScript(
       kScriptChars,
       reinterpret_cast<Dart_NativeEntryResolver>(native_lookup));
   Dart_Handle cls = Dart_GetClass(lib, NewString("StackFrame2Test"));
   EXPECT_VALID(Dart_Invoke(cls, NewString("testMain"), 0, NULL));
 }
 
-#endif  // TARGET_ARCH_IA32 || TARGET_ARCH_X64 || TARGET_ARCH_ARM
-
 }  // namespace dart