win: Remove GetModuleFromAddress, deduplicate __ImageBase code.

base/win/scoped_handle.cc

Index: base/win/scoped_handle.cc
diff --git a/base/win/scoped_handle.cc b/base/win/scoped_handle.cc
index 7fa8b4380913d4aed8e0b927fb8c0a3d2d82c22d..cce16281ae41200776cafa73efbf8a59c2cb8f84 100644
--- a/base/win/scoped_handle.cc
+++ b/base/win/scoped_handle.cc
@@ -16,15 +16,13 @@
 #include "base/macros.h"
 #include "base/synchronization/lock_impl.h"
 #include "base/threading/thread_local.h"
+#include "base/win/current_module.h"
 
 extern "C" {
 __declspec(dllexport) void* GetHandleVerifier();
 typedef void* (*GetHandleVerifierFn)();
 }
 
-// http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
-extern "C" IMAGE_DOS_HEADER __ImageBase;
-
 namespace {
 
 struct HandleHash {
@@ -247,7 +245,7 @@ void ActiveVerifier::OnHandleBeingClosed(HANDLE handle) {
 }
 
 HMODULE ActiveVerifier::GetModule() const {
-  return reinterpret_cast<HMODULE>(&__ImageBase);
+  return CURRENT_MODULE();
 }
 
 }  // namespace