UI resource are evicted when LTH is set to not visible.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 98f48668fa557eb5ded6e57117847a16cb1f7757..8f5e0f82b7553b91c096afa0346ebec9a8b0740a 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -6314,5 +6314,43 @@ TEST_F(LayerTreeHostImplTest, UIResourceManagement) {
   EXPECT_EQ(0u, context3d->NumTextures());
 }
 
+TEST_F(LayerTreeHostImplTest, EvictUIResourceWhenNotVisible) {
+  scoped_ptr<TestWebGraphicsContext3D> context =
+      TestWebGraphicsContext3D::Create();
+  TestWebGraphicsContext3D* context3d = context.get();
+  scoped_ptr<OutputSurface> output_surface = CreateFakeOutputSurface();
+  host_impl_->InitializeRenderer(output_surface.Pass());
+
+  scoped_ptr<LayerImpl> scoped_root =
+      LayerImpl::Create(host_impl_->active_tree(), 1);
+  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
+
+  EXPECT_EQ(0u, context3d->NumTextures());
+
+  UIResourceId uid1 = 1;
+  scoped_refptr<UIResourceBitmap> bitmap = UIResourceBitmap::Create(
+      new uint8_t[1], UIResourceBitmap::RGBA8, gfx::Size(1, 1));
+  host_impl_->CreateUIResource(uid1, bitmap);
+  EXPECT_EQ(1u, context3d->NumTextures());
+  ResourceProvider::ResourceId id1 = host_impl_->ResourceIdForUIResource(uid1);
+  EXPECT_NE(0u, id1);
+
+  UIResourceId uid2 = 2;
+  host_impl_->CreateUIResource(uid2, bitmap);
+  ResourceProvider::ResourceId id2 = host_impl_->ResourceIdForUIResource(uid2);
+  EXPECT_NE(0u, id2);
+  EXPECT_NE(id1, id2);
+  EXPECT_EQ(2u, context3d->NumTextures());
+
+  EXPECT_TRUE(host_impl_->CanDraw());
+
+  host_impl_->SetVisible(false);
+  EXPECT_EQ(0u, context3d->NumTextures());
+  EXPECT_EQ(0u, host_impl_->ResourceIdForUIResource(uid1));
+  EXPECT_EQ(0u, host_impl_->ResourceIdForUIResource(uid2));
+
+  EXPECT_FALSE(host_impl_->CanDraw());
+}
+
 }  // namespace
 }  // namespace cc