Revert of GrResourceCache2 manages scratch texture.

tests/ResourceCacheTest.cpp

 /*
  * Copyright 2013 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 "SkCanvas.h"
@@ skipping 229 matching lines @@
 
         REPORTER_ASSERT(reporter, 200 == cache.getCachedResourceBytes());
         REPORTER_ASSERT(reporter, 2 == cache.getCachedResourceCount());
 
         static_cast<TestResource*>(cache.find(key2))->setSize(201);
         REPORTER_ASSERT(reporter, NULL == cache.find(key1));
 
         REPORTER_ASSERT(reporter, 201 == cache.getCachedResourceBytes());
         REPORTER_ASSERT(reporter, 1 == cache.getCachedResourceCount());
     }
+
+    // Test changing the size of an exclusively-held resource.
+    {
+        GrResourceCache cache(2, 300);
+
+        TestResource* a = new TestResource(context->getGpu(), 100);
+        cache.addResource(key1, a);
+        cache.makeExclusive(a->getCacheEntry());
+
+        TestResource* b = new TestResource(context->getGpu(), 100);
+        cache.addResource(key2, b);
+        b->unref();
+
+        REPORTER_ASSERT(reporter, 200 == cache.getCachedResourceBytes());
+        REPORTER_ASSERT(reporter, 2 == cache.getCachedResourceCount());
+        REPORTER_ASSERT(reporter, NULL == cache.find(key1));
+
+        a->setSize(200);
+
+        REPORTER_ASSERT(reporter, 300 == cache.getCachedResourceBytes());
+        REPORTER_ASSERT(reporter, 2 == cache.getCachedResourceCount());
+        // Internal resource cache validation will test the detached size (debug mode only).
+
+        cache.makeNonExclusive(a->getCacheEntry());
+        a->unref();
+
+        REPORTER_ASSERT(reporter, 300 == cache.getCachedResourceBytes());
+        REPORTER_ASSERT(reporter, 2 == cache.getCachedResourceCount());
+        REPORTER_ASSERT(reporter, cache.find(key1));
+        // Internal resource cache validation will test the detached size (debug mode only).
+    }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 DEF_GPUTEST(ResourceCache, reporter, factory) {
     for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
         GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
         if (!GrContextFactory::IsRenderingGLContext(glType)) {
             continue;
         }
         GrContext* context = factory->get(glType);
@@ skipping 10 matching lines @@
         SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(context, info));
 
         test_cache(reporter, context, surface->getCanvas());
         test_purge_invalidated(reporter, context);
         test_cache_delete_on_destruction(reporter, context);
         test_resource_size_changed(reporter, context);
     }
 }
 
 #endif