Deleted OS_WIN and all Windows specific files from base.

base/files/memory_mapped_file.h

Index: base/files/memory_mapped_file.h
diff --git a/base/files/memory_mapped_file.h b/base/files/memory_mapped_file.h
index 96d1d91f9359b8c96c9646a444add20be2555472..23a7a65dad31934e8df84e0c57beffbc95e70c9e 100644
--- a/base/files/memory_mapped_file.h
+++ b/base/files/memory_mapped_file.h
@@ -10,10 +10,6 @@
 #include "base/files/file.h"
 #include "build/build_config.h"
 
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 namespace base {
 
 class FilePath;
@@ -59,12 +55,6 @@ class BASE_EXPORT MemoryMappedFile {
   // As above, but works with a region of an already-opened file.
   bool Initialize(File file, const Region& region);
 
-#if defined(OS_WIN)
-  // Opens an existing file and maps it as an image section. Please refer to
-  // the Initialize function above for additional information.
-  bool InitializeAsImageSection(const FilePath& file_name);
-#endif  // OS_WIN
-
   const uint8* data() const { return data_; }
   size_t length() const { return length_; }
 
@@ -95,11 +85,6 @@ class BASE_EXPORT MemoryMappedFile {
   uint8* data_;
   size_t length_;
 
-#if defined(OS_WIN)
-  win::ScopedHandle file_mapping_;
-  bool image_;  // Map as an image.
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile);
 };