cc: Update Main RendererCapabilities on DeferredInitialize

cc/layers/texture_layer_unittest.cc

Index: cc/layers/texture_layer_unittest.cc
diff --git a/cc/layers/texture_layer_unittest.cc b/cc/layers/texture_layer_unittest.cc
index cfbe8133fbf51cd445a1397fd2dde1b0a19434a8..14eb58b6919ba560b93c4515b128b3f7e8db8b60 100644
--- a/cc/layers/texture_layer_unittest.cc
+++ b/cc/layers/texture_layer_unittest.cc
@@ -17,11 +17,14 @@
 #include "cc/layers/texture_layer_impl.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/context_provider.h"
+#include "cc/resources/resource_update_queue.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/test/fake_impl_proxy.h"
+#include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/fake_layer_tree_host_client.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
+#include "cc/test/fake_proxy.h"
 #include "cc/test/layer_test_common.h"
 #include "cc/test/layer_tree_test.h"
 #include "cc/test/test_web_graphics_context_3d.h"
@@ -2178,5 +2181,68 @@ class TextureLayerWithMailboxImplThreadDeleted : public LayerTreeTest {
 SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(
     TextureLayerWithMailboxImplThreadDeleted);
 
+class FakeMailboxTextureLayerClient : public TextureLayerClient {
+ public:
+  FakeMailboxTextureLayerClient()
+      : prepare_texture_mailbox_(0), mailbox_released_(0) {}
+
+  // TextureLayerClient implementation.
+  virtual unsigned PrepareTexture() OVERRIDE {
+    NOTREACHED();
+    return 0;
+  }
+  virtual bool PrepareTextureMailbox(
+      TextureMailbox* texture_mailbox,
+      scoped_ptr<SingleReleaseCallback>* release_callback,
+      bool use_shared_memory) OVERRIDE {
+    prepare_texture_mailbox_++;
+    *texture_mailbox = TextureMailbox(
+        MailboxFromString(std::string(64, '1')), GL_TEXTURE_2D, 0);
+    *release_callback = SingleReleaseCallback::Create(
+        base::Bind(&FakeMailboxTextureLayerClient::MailboxReleased,
+                   base::Unretained(this)));
+    return true;
+  }
+
+  void MailboxReleased(uint32 sync_point, bool lost_resource) {
+    mailbox_released_++;
+  }
+
+  int prepare_texture_mailbox() { return prepare_texture_mailbox_; }
+  int mailbox_released() { return mailbox_released_; }
+
+ private:
+  int prepare_texture_mailbox_;
+  int mailbox_released_;
+};
+
+TEST(TextureLayerUnittest, ReleaseMailboxOnRendererCapabilityChange) {
+  FakeMailboxTextureLayerClient client;
+  scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
+  host->InitializeForTesting(scoped_ptr<Proxy>(new FakeProxy));
+  FakeProxy* fake_proxy = static_cast<FakeProxy*>(host->proxy());
+
+  scoped_refptr<TextureLayer> test_layer =
+      TextureLayer::CreateForMailbox(&client);
+  test_layer->SetLayerTreeHost(host.get());
+
+  fake_proxy->GetRendererCapabilities().using_shared_memory_resources = false;
+  scoped_ptr<ResourceUpdateQueue> queue =
+      make_scoped_ptr(new ResourceUpdateQueue);
+  test_layer->SavePaintProperties();
+  EXPECT_TRUE(test_layer->Update(queue.get(), NULL));
+  EXPECT_EQ(1, client.prepare_texture_mailbox());
+  EXPECT_EQ(0, client.mailbox_released());
+
+  // Update when using_shared_memory_resources changed. Should release old
+  // mailbox back to client, and acquire a new one.
+  fake_proxy->GetRendererCapabilities().using_shared_memory_resources = true;
+  EXPECT_TRUE(test_layer->Update(queue.get(), NULL));
+  EXPECT_EQ(2, client.prepare_texture_mailbox());
+  EXPECT_EQ(1, client.mailbox_released());
+
+  test_layer->SetLayerTreeHost(NULL);
+}
+
 }  // namespace
 }  // namespace cc