X64 Crankshaft: Fix compilation error on Windows X64.

src/x64/deoptimizer-x64.cc

 // Copyright 2010 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 127 matching lines @@
   unsigned height_in_bytes = height * kPointerSize;
   if (FLAG_trace_deopt) {
     PrintF("  translating ");
     function->PrintName();
     PrintF(" => node=%d, height=%d\n", node_id, height_in_bytes);
   }
 
   // The 'fixed' part of the frame consists of the incoming parameters and
   // the part described by JavaScriptFrameConstants.
   unsigned fixed_frame_size = ComputeFixedSize(function);
-  unsigned input_frame_size = input_->GetFrameSize();
+  unsigned input_frame_size = static_cast<unsigned>(input_->GetFrameSize());
   unsigned output_frame_size = height_in_bytes + fixed_frame_size;
 
   // Allocate and store the output frame description.
   FrameDescription* output_frame =
       new(output_frame_size) FrameDescription(output_frame_size, function);
 
   bool is_bottommost = (0 == frame_index);
   bool is_topmost = (output_count_ - 1 == frame_index);
   ASSERT(frame_index >= 0 && frame_index < output_count_);
   ASSERT(output_[frame_index] == NULL);
@@ skipping 340 matching lines @@
   }
   __ bind(&done);
 }
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64