Move purging from OnMemoryState to OnPurgeMemory() in cc/

cc/resources/resource_pool_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/resource_pool.h"
 
 #include <stddef.h>
 
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 335 matching lines @@
 
   gfx::Size size(100, 100);
   ResourceFormat format = RGBA_8888;
   gfx::ColorSpace color_space = gfx::ColorSpace::CreateSRGB();
   Resource* resource =
       resource_pool_->AcquireResource(size, format, color_space);
 
   EXPECT_EQ(1u, resource_pool_->GetTotalResourceCountForTesting());
   EXPECT_EQ(0u, resource_pool_->GetBusyResourceCountForTesting());
 
-  // Suspending should not impact an in-use resource.
+  // Purging and suspending should not impact an in-use resource.
+  resource_pool_->OnPurgeMemory();
   resource_pool_->OnMemoryStateChange(base::MemoryState::SUSPENDED);
   EXPECT_EQ(1u, resource_pool_->GetTotalResourceCountForTesting());
   EXPECT_EQ(0u, resource_pool_->GetBusyResourceCountForTesting());
   resource_pool_->OnMemoryStateChange(base::MemoryState::NORMAL);
 
   // Release the resource making it busy.
   resource_pool_->ReleaseResource(resource);
   EXPECT_EQ(1u, resource_pool_->GetTotalResourceCountForTesting());
   EXPECT_EQ(1u, resource_pool_->GetBusyResourceCountForTesting());
 
-  // Suspending should now free the busy resource.
+  // Purging and suspending should now free the busy resource.
+  resource_pool_->OnPurgeMemory();
   resource_pool_->OnMemoryStateChange(base::MemoryState::SUSPENDED);
   EXPECT_EQ(0u, resource_pool_->GetTotalResourceCountForTesting());
   EXPECT_EQ(0u, resource_pool_->GetBusyResourceCountForTesting());
 }
 
 TEST_F(ResourcePoolTest, TextureHintRespected) {
   gfx::Size size(100, 100);
   ResourceFormat format = RGBA_8888;
   gfx::ColorSpace color_space;
 
   resource_pool_ =
       ResourcePool::Create(resource_provider_.get(), task_runner_.get(),
                            ResourceProvider::TEXTURE_HINT_IMMUTABLE,
                            base::TimeDelta::FromMilliseconds(100));
   Resource* resource =
       resource_pool_->AcquireResource(size, format, color_space);
   EXPECT_TRUE(resource_provider_->IsImmutable(resource->id()));
   resource_pool_->ReleaseResource(resource);
 
   resource_pool_ =
       ResourcePool::Create(resource_provider_.get(), task_runner_.get(),
                            ResourceProvider::TEXTURE_HINT_DEFAULT,
                            base::TimeDelta::FromMilliseconds(100));
   resource = resource_pool_->AcquireResource(size, format, color_space);
   EXPECT_FALSE(resource_provider_->IsImmutable(resource->id()));
   resource_pool_->ReleaseResource(resource);
 }
 
 }  // namespace cc