cc: Delete the Renderer base class.

cc/output/delegating_renderer.cc

Index: cc/output/delegating_renderer.cc
diff --git a/cc/output/delegating_renderer.cc b/cc/output/delegating_renderer.cc
index 9438fb8923f2c78e83cf627cc620ba23a2ca4cef..47e9a7942f67ea09b1b456cf31c90cdd180367a4 100644
--- a/cc/output/delegating_renderer.cc
+++ b/cc/output/delegating_renderer.cc
@@ -20,22 +20,9 @@
 
 namespace cc {
 
-std::unique_ptr<DelegatingRenderer> DelegatingRenderer::Create(
-    RendererClient* client,
-    const RendererSettings* settings,
-    OutputSurface* output_surface,
-    ResourceProvider* resource_provider) {
-  return base::WrapUnique(new DelegatingRenderer(
-      client, settings, output_surface, resource_provider));
-}
-
-DelegatingRenderer::DelegatingRenderer(RendererClient* client,
-                                       const RendererSettings* settings,
-                                       OutputSurface* output_surface,
+DelegatingRenderer::DelegatingRenderer(OutputSurface* output_surface,
                                        ResourceProvider* resource_provider)
-    : Renderer(client, settings),
-      output_surface_(output_surface),
-      resource_provider_(resource_provider) {
+    : output_surface_(output_surface), resource_provider_(resource_provider) {
   DCHECK(resource_provider_);
 
   capabilities_.using_partial_swap = false;
@@ -66,11 +53,7 @@ DelegatingRenderer::DelegatingRenderer(RendererClient* client,
   }
 }
 
-DelegatingRenderer::~DelegatingRenderer() {}
-
-const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
-  return capabilities_;
-}
+DelegatingRenderer::~DelegatingRenderer() = default;
 
 void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
                                    float device_scale_factor,
@@ -110,9 +93,12 @@ void DelegatingRenderer::ReclaimResources(
   resource_provider_->ReceiveReturnsFromParent(resources);
 }
 
-void DelegatingRenderer::DidChangeVisibility() {
+void DelegatingRenderer::SetVisible(bool visible) {
+  if (visible == visible_)
+    return;
+  visible_ = visible;
   ContextProvider* context_provider = output_surface_->context_provider();
-  if (!visible()) {
+  if (!visible_) {
     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
     if (context_provider) {
       context_provider->DeleteCachedResources();
@@ -121,8 +107,7 @@ void DelegatingRenderer::DidChangeVisibility() {
   }
   if (context_provider) {
     // If we are not visible, we ask the context to aggressively free resources.
-    context_provider->ContextSupport()->SetAggressivelyFreeResources(
-        !visible());
+    context_provider->ContextSupport()->SetAggressivelyFreeResources(!visible_);
   }
 }