make gc branch compile on Win32.

src/spaces.h

 // Copyright 2011 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 361 matching lines @@
     SCAN_ON_SCAVENGE,
     IN_FROM_SPACE,  // Mutually exclusive with IN_TO_SPACE.
     IN_TO_SPACE,    // All pages in new space has one of these two set.
     NEW_SPACE_BELOW_AGE_MARK,
     CONTAINS_ONLY_DATA,
     EVACUATION_CANDIDATE,
     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);
   }
 
   void SetFlagTo(int flag, bool value) {
     if (value) {
       SetFlag(flag);
     } else {
       ClearFlag(flag);
     }
   }
 
   bool IsFlagSet(int flag) {
-    return (flags_ & (1 << flag)) != 0;
+    return (flags_ & (static_cast<uintptr_t>(1) << flag)) != 0;
   }
 
   // Set or clear multiple flags at a time. The flags in the mask
   // are set to the value in "flags", the rest retain the current value
   // in flags_.
   void SetFlags(intptr_t flags, intptr_t mask) {
     flags_ = (flags_ & ~mask) | (flags & mask);
   }
 
   // Return all current flags.
   intptr_t GetFlags() { return flags_; }
 
   // Manage live byte count (count of bytes known to be live,
   // because they are marked black).
   void ResetLiveBytes() {
     live_byte_count_ = 0;
   }
   void IncrementLiveBytes(int by) {
     live_byte_count_ += by;
   }
   int LiveBytes() { return live_byte_count_; }
   static void IncrementLiveBytes(Address address, int by) {
     MemoryChunk::FromAddress(address)->IncrementLiveBytes(by);
   }
 
-  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 intptr_t kLiveBytesOffset =
       kPointerSize + kPointerSize + kPointerSize + kPointerSize +
       kPointerSize + kPointerSize + kIntSize;
 
   static const size_t kHeaderSize = kLiveBytesOffset + kIntSize;
 
   static const int kBodyOffset =
@@ skipping 2084 matching lines @@
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_