make gc branch compile on Win32.

src/spaces.h

 // Copyright 2006-2010 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 285 matching lines @@
   bool is_valid() { return address() != NULL; }
 
   MemoryChunk* next_chunk() const { return next_chunk_; }
 
   void set_next_chunk(MemoryChunk* next) { next_chunk_ = next; }
 
   Space* owner() const { return owner_; }
 
   Address body() { return address() + kBodyOffset; }
 
-  int body_size() { return size() - kBodyOffset; }
+  int body_size() { return static_cast<int>(size() - kBodyOffset); }
 
   enum MemoryChunkFlags {
     IS_EXECUTABLE,
     NUM_MEMORY_CHUNK_FLAGS
   };
 
   void SetFlag(int flag) {
-    flags_ |= 1 << flag;
+    flags_ |= static_cast<uintptr_t>(1) << flag;
   }
 
   void ClearFlag(int flag) {
-    flags_ &= ~(1 << flag);
+    flags_ &= ~(static_cast<uintptr_t>(1) << flag);
   }
 
   bool IsFlagSet(int flag) {
-    return (flags_ & (1 << flag)) != 0;
+    return (flags_ & (static_cast<uintptr_t>(1) << flag)) != 0;
   }
 
-  static const intptr_t kAlignment = (1 << kPageSizeBits);
+  static const intptr_t kAlignment =
+      (static_cast<uintptr_t>(1) << kPageSizeBits);
 
   static const intptr_t kAlignmentMask = kAlignment - 1;
 
   static const size_t kHeaderSize = kPointerSize + kPointerSize + kPointerSize +
     kPointerSize + kPointerSize + kPointerSize;
 
   static const size_t kMarksBitmapLength =
     (1 << kPageSizeBits) >> (kPointerSizeLog2);
 
   static const size_t kMarksBitmapSize =
@@ skipping 1951 matching lines @@
 
  private:
   LargePage* current_;
   HeapObjectCallback size_func_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_