Allow build-time selection between ia32 and x86_64 in the GYP/Xcode Mac Chromium build

src/ia32/frames-ia32.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
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 // met:
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 #include "v8.h"
 
+#if defined(V8_TARGET_ARCH_IA32)
+
 #include "frames-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
 StackFrame::Type StackFrame::ComputeType(State* state) {
   ASSERT(state->fp != NULL);
   if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
     return ARGUMENTS_ADAPTOR;
@@ skipping 62 matching lines @@
 
 
 Address InternalFrame::GetCallerStackPointer() const {
   // Internal frames have no arguments. The stack pointer of the
   // caller is at a fixed offset from the frame pointer.
   return fp() + StandardFrameConstants::kCallerSPOffset;
 }
 
 
 } }  // namespace v8::internal
+
+#endif  // V8_TARGET_ARCH_IA32