Support using OpenGL ES context on desktop

dm/DMGpuSupport.h

 #ifndef DMGpuSupport_DEFINED
 #define DMGpuSupport_DEFINED
 
 // Provides Ganesh to DM,
 // or if it's not available, fakes it enough so most code doesn't have to know that.
 
 #include "SkSurface.h"
 
 #if SK_SUPPORT_GPU
 
 // Ganesh is available.  Yippee!
 
 #  include "GrContext.h"
 #  include "GrContextFactory.h"
 
 namespace DM {
 
 static const bool kGPUDisabled = false;
 
 static inline SkSurface* NewGpuSurface(GrContextFactory* grFactory,
                                        GrContextFactory::GLContextType type,
+                                       GrGLStandard gpuAPI,
                                        SkImageInfo info,
                                        int samples) {
-    return SkSurface::NewRenderTarget(grFactory->get(type), info, samples);
+    return SkSurface::NewRenderTarget(grFactory->get(type, gpuAPI), info, samples);
 }
 
 }  // namespace DM
 
 #else// !SK_SUPPORT_GPU
 
 // Ganesh is not available.  Fake it.
 
+enum GrGLStandard {
+    kNone_GrGLStandard,
+    kGL_GrGLStandard,
+    kGLES_GrGLStandard
+};
+
 class GrContextFactory {
 public:
     typedef int GLContextType;
 
     static const GLContextType kANGLE_GLContextType  = 0,
                                kDebug_GLContextType  = 0,
                                kMESA_GLContextType   = 0,
                                kNVPR_GLContextType   = 0,
                                kNative_GLContextType = 0,
                                kNull_GLContextType   = 0;
 };
 
 namespace DM {
 
 static const bool kGPUDisabled = true;
 
 static inline SkSurface* NewGpuSurface(GrContextFactory*,
                                        GrContextFactory::GLContextType,
+                                       GrGLStandard,
                                        SkImageInfo,
                                        int) {
     return NULL;
 }
 
 }  // namespace DM
 
 #endif//SK_SUPPORT_GPU
 
 #endif//DMGpuSupport_DEFINED