Add config options to run different GPU APIs to dm and nanobench

src/gpu/gl/debug/SkDebugGLContext.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkDebugGLContext_DEFINED
 #define SkDebugGLContext_DEFINED
 
 #include "gl/SkGLContext.h"
 
 class SkDebugGLContext : public SkGLContext {
 public:
     ~SkDebugGLContext() override;
 
-    static SkDebugGLContext* Create(GrGLStandard forcedGpuAPI) {
-        if (kGLES_GrGLStandard == forcedGpuAPI) {
-            return nullptr;
-        }
+    static SkDebugGLContext* Create() {
         return new SkDebugGLContext;
     }
 private:
     void onPlatformMakeCurrent() const override {}
     void onPlatformSwapBuffers() const override {}
     GrGLFuncPtr onPlatformGetProcAddress(const char*) const override { return nullptr; }
 
     SkDebugGLContext();
 };
 
 #endif