Deleted OS_WIN and all Windows specific files from base.

base/process/memory.h

Index: base/process/memory.h
diff --git a/base/process/memory.h b/base/process/memory.h
index da27151d1b1b31b3500bf0c59151d702c2a2c61e..97ee9e71fe0d7f06268d001a78c4f3129c56d65e 100644
--- a/base/process/memory.h
+++ b/base/process/memory.h
@@ -10,10 +10,6 @@
 #include "base/process/process_handle.h"
 #include "build/build_config.h"
 
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 #ifdef PVALLOC_AVAILABLE
 // Build config explicitly tells us whether or not pvalloc is available.
 #elif defined(LIBC_GLIBC) && !defined(USE_TCMALLOC)
@@ -43,12 +39,6 @@ BASE_EXPORT void EnableTerminationOnOutOfMemory();
 // Crash reporting classifies such crashes as OOM.
 BASE_EXPORT void TerminateBecauseOutOfMemory(size_t size);
 
-#if defined(OS_WIN)
-// Returns the module handle to which an address belongs. The reference count
-// of the module is not incremented.
-BASE_EXPORT HMODULE GetModuleFromAddress(void* address);
-#endif
-
 #if defined(OS_LINUX) || defined(OS_ANDROID)
 BASE_EXPORT extern size_t g_oom_size;