SkLeanWindows.h: #include "Windows.h" fewer places

src/utils/win/SkWGL.h

Index: src/utils/win/SkWGL.h
diff --git a/src/utils/win/SkWGL.h b/src/utils/win/SkWGL.h
index ebd95e7a8308f1a5a1eb8275ecd7b10e77a5872a..3799377cc3c425444a8f408bf9a6116e0a4398a2 100644
--- a/src/utils/win/SkWGL.h
+++ b/src/utils/win/SkWGL.h
@@ -10,6 +10,8 @@
 #ifndef SkWGL_DEFINED
 #define SkWGL_DEFINED
 
+#include "SkLeanWindows.h"
+
 /**
  * Working with WGL extensions can be a pain. Among the reasons is that You must
  * have a GL context to get the proc addresses, but you want to use the procs to
@@ -22,16 +24,6 @@
  * an extension.
  */
 
-#if !defined(WIN32_LEAN_AND_MEAN)
-    #define WIN32_LEAN_AND_MEAN
-    #define SK_LOCAL_LEAN_AND_MEAN
-#endif
-#include <windows.h>
-#if defined(SK_LOCAL_LEAN_AND_MEAN)
-    #undef WIN32_LEAN_AND_MEAN
-    #undef SK_LOCAL_LEAN_AND_MEAN
-#endif
-
 #define SK_WGL_DRAW_TO_WINDOW                       0x2001
 #define SK_WGL_ACCELERATION                         0x2003
 #define SK_WGL_SUPPORT_OPENGL                       0x2010