Don't free non-tile resources on GPU rasterization toggle

cc/layers/texture_layer_impl_unittest.cc

 // Copyright 2014 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/layers/texture_layer_impl.h"
 
 #include <stddef.h>
 
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/output/context_provider.h"
@@ skipping 129 matching lines @@
 
     EXPECT_EQ(1u, impl.quad_list().size());
     ASSERT_EQ(DrawQuad::Material::TEXTURE_CONTENT,
               impl.quad_list().front()->material);
     const TextureDrawQuad* quad =
         TextureDrawQuad::MaterialCast(impl.quad_list().front());
     EXPECT_TRUE(quad->secure_output_only);
   }
 }
 
+TEST(TextureLayerImplTest, ResourceNotFreedOnGpuRasterToggle) {
+  LayerTreeSettings settings;
+  settings.gpu_rasterization_enabled = true;
+  LayerTestCommon::LayerImplTest impl(settings);
+  impl.host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));
+
+  gfx::Size layer_size(1000, 1000);
+  gfx::Size viewport_size(1000, 1000);
+
+  gpu::Mailbox mailbox;
+  impl.compositor_frame_sink()
+      ->context_provider()
+      ->ContextGL()
+      ->GenMailboxCHROMIUM(mailbox.name);
+  TextureMailbox texture_mailbox(
+      mailbox,
+      gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO, 0x123,
+                     gpu::CommandBufferId::FromUnsafeValue(0x234), 0x456),
+      GL_TEXTURE_2D);
+
+  TextureLayerImpl* texture_layer_impl =
+      impl.AddChildToRoot<TextureLayerImpl>();
+  texture_layer_impl->SetBounds(layer_size);
+  texture_layer_impl->SetDrawsContent(true);
+  bool released = false;
+  texture_layer_impl->SetTextureMailbox(
+      texture_mailbox,
+      SingleReleaseCallbackImpl::Create(base::Bind(
+          [](bool* released, const gpu::SyncToken& sync_token, bool lost,
+             BlockingTaskRunner* main_thread_task_runner) { *released = true; },
+          base::Unretained(&released))));
+
+  impl.CalcDrawProps(viewport_size);
+
+  // Gpu rasterization is disabled by default.
+  EXPECT_FALSE(impl.host_impl()->use_gpu_rasterization());
+  EXPECT_FALSE(released);
+  // Toggling the gpu rasterization clears all tilings on both trees.
+  impl.host_impl()->SetHasGpuRasterizationTrigger(true);
+  impl.host_impl()->SetContentIsSuitableForGpuRasterization(true);
+  impl.host_impl()->CommitComplete();
+  EXPECT_TRUE(impl.host_impl()->use_gpu_rasterization());
+  EXPECT_FALSE(released);
+}
+
 }  // namespace
 }  // namespace cc