Simplify random_draw_context used by GLProgramsTest

tests/GLProgramsTest.cpp

Index: tests/GLProgramsTest.cpp
diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index 171ed613163a2993a113cebc5dc3e2839e100f44..16a259207852daa8cb4e8035a132d299d8f993cd 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -154,33 +154,12 @@ static sk_sp<GrDrawContext> random_draw_context(GrContext* context,
                                                 : kBottomLeft_GrSurfaceOrigin;
     int sampleCnt = random->nextBool() ? SkTMin(4, caps->maxSampleCount()) : 0;
 
-    GrUniqueKey key;

[bsalomon, 2016/07/19 15:04:29]

I presume this keying was preserved from pre-DC days in order to avoid texture
creation churn. However, just creating the DC directly all the time falls back
on the scratch texture mechanism and on my machine runs significantly faster.

-    static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
-    GrUniqueKey::Builder builder(&key, kDomain, 2);
-    builder[0] = origin;
-    builder[1] = sampleCnt;
-    builder.finish();
-
-    sk_sp<GrTexture> texture(context->textureProvider()->findAndRefTextureByUniqueKey(key));
-    if (texture) {
-        sk_sp<GrRenderTarget> rt(sk_ref_sp(texture->asRenderTarget()));
-        return context->drawContext(std::move(rt));
-    }
-
     sk_sp<GrDrawContext> drawContext(context->newDrawContext(SkBackingFit::kExact,
                                                              kRenderTargetWidth,
                                                              kRenderTargetHeight,
                                                              kRGBA_8888_GrPixelConfig,
                                                              sampleCnt,
                                                              origin));
-    if (!drawContext) {
-        return nullptr;
-    }
-
-    // TODO: need a real way to do this via the drawContext
-    texture = drawContext->asTexture();
-    context->textureProvider()->assignUniqueKeyToTexture(key, texture.get());
-
     return drawContext;
 }