Move CPU-specific constants from debug.h into the platform-specific directori...

src/x64/codegen-x64.cc

Index: src/x64/codegen-x64.cc
===================================================================
--- src/x64/codegen-x64.cc	(revision 3380)
+++ src/x64/codegen-x64.cc	(working copy)
@@ -505,13 +505,13 @@
   // Add padding that will be overwritten by a debugger breakpoint.
   // frame_->Exit() generates "movq rsp, rbp; pop rbp; ret k"
   // with length 7 (3 + 1 + 3).
-  const int kPadding = Debug::kX64JSReturnSequenceLength - 7;
+  const int kPadding = Assembler::kJSReturnSequenceLength - 7;
   for (int i = 0; i < kPadding; ++i) {
     masm_->int3();
   }
   // Check that the size of the code used for returning matches what is
   // expected by the debugger.
-  ASSERT_EQ(Debug::kX64JSReturnSequenceLength,
+  ASSERT_EQ(Assembler::kJSReturnSequenceLength,
             masm_->SizeOfCodeGeneratedSince(&check_exit_codesize));
 #endif
   DeleteFrame();