Support FrameLookup vm test on ARM, requiring among other things:

runtime/vm/assembler_arm.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 233 matching lines @@
     ASSERT(Utils::IsAbsoluteUint(12, offset));
     kind_ = Immediate;
     if (offset < 0) {
       encoding_ = (am ^ (1 << kUShift)) | -offset;  // Flip U to adjust sign.
     } else {
       encoding_ = am | offset;
     }
     encoding_ |= static_cast<uint32_t>(rn) << kRnShift;
   }
 
-  explicit Address(Register rn, Register rm, Shift shift = LSL,
-                   uint32_t shift_imm = 0, Mode am = Offset) {
+  Address(Register rn, Register rm,
+          Shift shift = LSL, uint32_t shift_imm = 0, Mode am = Offset) {
     ShifterOperand so(rm, shift, shift_imm);
 
     kind_ = ShiftedRegister;
     encoding_ = so.encoding() | am | (static_cast<uint32_t>(rn) << kRnShift);
   }
 
   static bool CanHoldLoadOffset(LoadOperandType type,
                                 int32_t offset,
                                 int32_t* offset_mask);
   static bool CanHoldStoreOffset(StoreOperandType type,
@@ skipping 366 matching lines @@
   void CallRuntime(const RuntimeEntry& entry);
 
   // Set up a Dart frame on entry with a frame pointer and PC information to
   // enable easy access to the RawInstruction object of code corresponding
   // to this frame.
   void EnterDartFrame(intptr_t frame_size);
   void LeaveDartFrame();
 
   // Set up a stub frame so that the stack traversal code can easily identify
   // a stub frame.
-  void EnterStubFrame();
-  void LeaveStubFrame();
+  void EnterStubFrame(bool uses_pp = false);
+  void LeaveStubFrame(bool uses_pp = false);
 
   // Instruction pattern from entrypoint is used in Dart frame prologs
   // to set up the frame and save a PC which can be used to figure out the
   // RawInstruction object corresponding to the code running in the frame.
   static const intptr_t kOffsetOfSavedPCfromEntrypoint = Instr::kPCReadOffset;
 
   // Inlined allocation of an instance of class 'cls', code has no runtime
   // calls. Jump to 'failure' if the instance cannot be allocated here.
   // Allocated instance is returned in 'instance_reg'.
   // Only the tags field of the object is initialized.
@@ skipping 129 matching lines @@
     return *reg1 - *reg2;
   }
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_