Support using OpenGL ES context on desktop

include/utils/SkWGL.h

Index: include/utils/SkWGL.h
diff --git a/include/utils/SkWGL.h b/include/utils/SkWGL.h
index 5f630a16892a48d6a9debaf22983b96066f246df..5272f17c87088b58ef3148824c0ca82de962e8c9 100644
--- a/include/utils/SkWGL.h
+++ b/include/utils/SkWGL.h
@@ -104,12 +104,22 @@ private:
     CreateContextAttribsProc fCreateContextAttribs;
 };
 
+enum SkWGLContextRequest {
+    /** Requests to create core profile context if possible, otherwise
+        compatibility profile. */
+    kGLPreferCoreProfile_SkWGLContextRequest,
+    /** Requests to create compatibility profile context if possible, otherwise
+        core profile. */
+    kGLPreferCompatibilityProfile_SkWGLContextRequest,
+    /** Requests to create GL ES profile context. */
+    kGLES_SkWGLContextRequest
+};
 /**
  * Helper to create an OpenGL context for a DC using WGL. Configs with a sample count >= to
  * msaaSampleCount are preferred but if none is available then a context with a lower sample count
  * (including non-MSAA) will be created. If preferCoreProfile is true but a core profile cannot be
  * created then a compatible profile context will be created.
  */
-HGLRC SkCreateWGLContext(HDC dc, int msaaSampleCount, bool preferCoreProfile);
+HGLRC SkCreateWGLContext(HDC dc, int msaaSampleCount, SkWGLContextRequest context);
 
 #endif