Fix Win64 compilation.

src/frames.cc

 // 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 637 matching lines @@
 
 void JavaScriptFrame::GetFunctions(List<JSFunction*>* functions) {
   ASSERT(functions->length() == 0);
   functions->Add(JSFunction::cast(function()));
 }
 
 
 void JavaScriptFrame::Summarize(List<FrameSummary>* functions) {
   ASSERT(functions->length() == 0);
   Code* code_pointer = code();
-  int offset = pc() - code_pointer->address();
+  int offset = static_cast<int>(pc() - code_pointer->address());
   FrameSummary summary(receiver(),
                        JSFunction::cast(function()),
                        code_pointer,
                        offset,
                        IsConstructor());
   functions->Add(summary);
 }
 
 
 void FrameSummary::Print() {
@@ skipping 103 matching lines @@
   // The code object may have been replaced by lazy deoptimization. Fall
   // back to a slow search in this case to find the original optimized
   // code object.
   if (!code->contains(pc())) {
     code = PcToCodeCache::GcSafeFindCodeForPc(pc());
   }
   ASSERT(code != NULL);
   ASSERT(code->kind() == Code::OPTIMIZED_FUNCTION);
 
   SafepointTable table(code);
-  unsigned pc_offset = pc() - code->instruction_start();
+  unsigned pc_offset = static_cast<unsigned>(pc() - code->instruction_start());
   for (unsigned i = 0; i < table.length(); i++) {
     if (table.GetPcOffset(i) == pc_offset) {
       *deopt_index = table.GetDeoptimizationIndex(i);
       break;
     }
   }
   ASSERT(*deopt_index != AstNode::kNoNumber);
 
   return DeoptimizationInputData::cast(code->deoptimization_data());
 }
@@ skipping 423 matching lines @@
   ZoneList<StackFrame*> list(10);
   for (StackFrameIterator it; !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame());
     list.Add(frame);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal