Use EXT_direct_state_access for path matrix manipulation

src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp

Index: src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
diff --git a/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp b/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
index c5c80bc406473e4cbb453926b55dd8107ad20bc5..6fd3d91c5aa67e1d94ad2d6f04702b0fbf4faf22 100644
--- a/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
+++ b/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
@@ -103,9 +103,6 @@ const GrGLInterface* GrGLCreateNativeInterface() {
         SET_PROC(GetString)
         SET_PROC(GetTexLevelParameteriv)
         SET_PROC(LineWidth)
-        SET_PROC(LoadIdentity)
-        SET_PROC(LoadMatrixf)
-        SET_PROC(MatrixMode)
         SET_PROC(PixelStorei)
         SET_PROC(ReadBuffer)
         SET_PROC(ReadPixels)
@@ -242,7 +239,12 @@ const GrGLInterface* GrGLCreateNativeInterface() {
             delete interface;
             return NULL;
         }
+
         WGL_SET_PROC(MapBuffer);
+        if (extensions.has("GL_EXT_direct_state_access")) {
+            WGL_SET_PROC_SUFFIX(MatrixLoadf, EXT);
+            WGL_SET_PROC_SUFFIX(MatrixLoadIdentity, EXT);
+        }
         WGL_SET_PROC(UnmapBuffer);
 
         if (extensions.has("GL_NV_path_rendering")) {