Support using OpenGL ES context on desktop

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 6adaf1964fc13b244bf7dddc4a01ea234a054f6b..d63dfbbcd63edf3bd6cd9f3f8f1f5a884e930f0a 100644
--- a/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
+++ b/src/gpu/gl/win/GrGLCreateNativeInterface_win.cpp
@@ -8,9 +8,21 @@
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLAssembleInterface.h"
+#include "gl/GrGLUtil.h"
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
+#include <GL/gl.h>
+
+#define GET_PROC(F) functions->f ## F = (GrGL ## F ## Proc) get(ctx, "gl" #F)
+#define GET_PROC_SUFFIX(F, S) functions->f ## F = (GrGL ## F ## Proc) get(ctx, "gl" #F #S)
+#define GET_PROC_LOCAL(F) GrGL ## F ## Proc F = (GrGL ## F ## Proc) get(ctx, "gl" #F)
+
+#define GET_LINKED GET_PROC
+#define GET_LINKED_SUFFIX GET_PROC_SUFFIX
+
+#include "gl/GrGLAssembleGLESInterface.h"
+
 class AutoLibraryUnload {
 public:
     AutoLibraryUnload(const char* moduleName) {
@@ -70,5 +82,13 @@ const GrGLInterface* GrGLCreateNativeInterface() {
         return NULL;
     }
 
-    return GrGLAssembleGLInterface(&getter, win_get_gl_proc);
+    const char* verStr = reinterpret_cast<const char*>(glGetString(GR_GL_VERSION));
+    GrGLStandard standard = GrGLGetStandardInUseFromString(verStr);
+
+    if (kGLES_GrGLStandard == standard) {
+        return GrGLAssembleGLESInterface(&getter, win_get_gl_proc);
+    } else if (kGL_GrGLStandard == standard) {
+        return GrGLAssembleGLInterface(&getter, win_get_gl_proc);
+    }
+    return NULL;
 }