One signature for creating unit tests that run on premade GrContexts

tests/GpuLayerCacheTest.cpp

 /*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
@@ skipping 89 matching lines @@
 
     cache->addUse(layer);
 
     REPORTER_ASSERT(reporter, 1 == TestingAccess::Uses(layer));
 }
 
 // This test case exercises the public API of the GrLayerCache class.
 // In particular it checks its interaction with the resource cache (w.r.t.
 // locking & unlocking textures).
 // TODO: need to add checks on VRAM usage!
-DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GpuLayerCache, reporter, context) {
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GpuLayerCache, reporter, ctxInfo) {
     // Add one more layer than can fit in the atlas
     static const int kInitialNumLayers = TestingAccess::NumPlots() + 1;
 
 #if GR_CACHE_STATS
     GrResourceCache::Stats stats;
 #endif
 
     sk_sp<SkPicture> picture;
 
     {
         SkPictureRecorder recorder;
         SkCanvas* c = recorder.beginRecording(1, 1);
         // Draw something, anything, to prevent an empty-picture optimization,
         // which is a singleton and never purged.
         c->drawRect(SkRect::MakeWH(1,1), SkPaint());
         picture = recorder.finishRecordingAsPicture();
     }
 
-    GrResourceCache* resourceCache = context->getResourceCache();
+    GrResourceCache* resourceCache = ctxInfo.fGrContext->getResourceCache();
 
-    GrLayerCache cache(context);
+    GrLayerCache cache(ctxInfo.fGrContext);
 
     create_layers(reporter, &cache, *picture, kInitialNumLayers, 0);
 
     for (int i = 0; i < kInitialNumLayers; ++i) {
         int key[1] = { i + 1 };
         GrCachedLayer* layer = TestingAccess::Find(&cache, picture->uniqueID(), SkMatrix::I(),
                                                    key, 1);
         REPORTER_ASSERT(reporter, layer);
 
         lock_layer(reporter, &cache, layer);
@@ skipping 218 matching lines @@
     cache.end();
 
 #if GR_CACHE_STATS
     resourceCache->getStats(&stats);
     REPORTER_ASSERT(reporter, 2 == stats.fTotal);
     REPORTER_ASSERT(reporter, 2 == stats.fNumPurgeable);
 #endif
 }
 
 #endif