A bunch of changes to get the ARM port compiling again.

src/virtual-frame-arm.h

Index: src/virtual-frame-arm.h
===================================================================
--- src/virtual-frame-arm.h	(revision 1245)
+++ src/virtual-frame-arm.h	(working copy)
@@ -29,6 +29,7 @@
 #define V8_VIRTUAL_FRAME_ARM_H_
 
 #include "macro-assembler.h"
+#include "register-allocator.h"
 
 namespace v8 { namespace internal {
 
@@ -77,6 +78,10 @@
   // Forget frame elements without generating code.
   void Forget(int count);
 
+  // Ensure that this frame is in a state where an arbitrary frame of the
+  // right size could be merged to it.  May emit code.
+  void MakeMergable() { }
+
   // Make this virtual frame have a state identical to an expected virtual
   // frame.  As a side effect, code may be emitted to make this frame match
   // the expected one.