Fixed bool <-> Executability confusion and improved typing a bit.

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 182 matching lines @@
   // only after PagedSpace::PrepareForMarkCompact was called.
   inline bool WasInUseBeforeMC();
 
   inline void SetWasInUseBeforeMC(bool was_in_use);
 
   // True if this page is a large object page.
   inline bool IsLargeObjectPage();
 
   inline void SetIsLargeObjectPage(bool is_large_object_page);
 
-  inline bool IsPageExecutable();
+  inline Executability PageExecutability();
 
-  inline void SetIsPageExecutable(bool is_page_executable);
+  inline void SetPageExecutability(Executability executable);
 
   // Returns the offset of a given address to this page.
   INLINE(int Offset(Address a)) {
     int offset = static_cast<int>(a - address());
     ASSERT_PAGE_OFFSET(offset);
     return offset;
   }
 
   // Returns the address for a given offset to the this page.
   Address OffsetToAddress(int offset) {
@@ skipping 2089 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_