New snapshot framework. Doesn't work on ARM yet (code targets...

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
===================================================================
--- src/arm/assembler-arm.h	(revision 3115)
+++ src/arm/assembler-arm.h	(working copy)
@@ -437,6 +437,11 @@
   INLINE(static Address target_address_at(Address pc));
   INLINE(static void set_target_address_at(Address pc, Address target));
 
+  // Here we are patching the address in the constant pool, not the actual call
+  // instruction.  The address in the constant pool is the same size as a
+  // pointer.
+  static const int kCallTargetSize = kPointerSize;
+
   // Size of an instruction.
   static const int kInstrSize = sizeof(Instr);