Revert of Add Gr*Proxy classes

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 31845f9d6df80b7c9c2ea819e4278f0d46ac37b1..a186bd87bc101f1cf9107ccc1903172adf354622 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -615,7 +615,7 @@
     return fDrawingManager->drawContext(std::move(rt), surfaceProps);
 }
 
-sk_sp<GrDrawContext> GrContext::newDrawContext(SkBackingFit fit,
+sk_sp<GrDrawContext> GrContext::newDrawContext(BackingFit fit,
                                                int width, int height,
                                                GrPixelConfig config,
                                                int sampleCnt,
@@ -629,7 +629,7 @@
     desc.fSampleCnt = sampleCnt;
 
     sk_sp<GrTexture> tex;
-    if (SkBackingFit::kExact == fit) {
+    if (kTight_BackingFit == fit) {
         tex.reset(this->textureProvider()->createTexture(desc, SkBudgeted::kYes));
     } else {
         tex.reset(this->textureProvider()->createApproxTexture(desc));