skia: Add ANGLE with GL backend to nanobench/DM

include/gpu/gl/angle/SkANGLEGLContext.h

Index: include/gpu/gl/angle/SkANGLEGLContext.h
diff --git a/include/gpu/gl/angle/SkANGLEGLContext.h b/include/gpu/gl/angle/SkANGLEGLContext.h
index 6590c765d89f060c59c0319522ac94154ca23356..8d5f83041a9d4a268fad8432297a281605b2a469 100644
--- a/include/gpu/gl/angle/SkANGLEGLContext.h
+++ b/include/gpu/gl/angle/SkANGLEGLContext.h
@@ -16,11 +16,11 @@ class SkANGLEGLContext : public SkGLContext {
 public:
     ~SkANGLEGLContext() override;
 
-    static SkANGLEGLContext* Create(GrGLStandard forcedGpuAPI) {
+    static SkANGLEGLContext* Create(GrGLStandard forcedGpuAPI, bool useGLBackend) {
         if (kGL_GrGLStandard == forcedGpuAPI) {
             return NULL;
         }
-        SkANGLEGLContext* ctx = new SkANGLEGLContext;
+        SkANGLEGLContext* ctx = new SkANGLEGLContext(useGLBackend);
         if (!ctx->isValid()) {
             delete ctx;
             return NULL;
@@ -29,10 +29,10 @@ public:
     }
 
     // The param is an EGLNativeDisplayType and the return is an EGLDispay.
-    static void* GetD3DEGLDisplay(void* nativeDisplay);
+    static void* GetD3DEGLDisplay(void* nativeDisplay, bool useGLBackend);
 
 private:
-    SkANGLEGLContext();
+    SkANGLEGLContext(bool preferGLBackend);
     void destroyGLContext();
 
     void onPlatformMakeCurrent() const override;