Implemented missing pieces of the debugger for ARM

src/arm/codegen-arm.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 162 matching lines @@
 
   RegisterAllocator* allocator() const { return allocator_; }
 
   CodeGenState* state() { return state_; }
   void set_state(CodeGenState* state) { state_ = state; }
 
   void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
 
   static const int kUnknownIntValue = -1;
 
+  // Number of instructions used for the JS return sequence. The constant is
+  // used by the debugger to patch the JS return sequence.
+  static const int kJSReturnSequenceLength = 4;
+
  private:
   // Construction/Destruction
   CodeGenerator(int buffer_size, Handle<Script> script, bool is_eval);
   virtual ~CodeGenerator() { delete masm_; }
 
   // Accessors
   Scope* scope() const { return scope_; }
 
   // Generating deferred code.
   void ProcessDeferred();
@@ skipping 300 matching lines @@
              constant_rhs_);
     }
   }
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_