cc: Delete all the RendererCapabilities.

cc/output/vulkan_renderer.h

Index: cc/output/vulkan_renderer.h
diff --git a/cc/output/vulkan_renderer.h b/cc/output/vulkan_renderer.h
index 59e80b9da5a7efa5ac1839dff909021e1692ab1e..cdbc038341c0e89ac068723032dcce766f1318d6 100644
--- a/cc/output/vulkan_renderer.h
+++ b/cc/output/vulkan_renderer.h
@@ -22,8 +22,7 @@ class CC_EXPORT VulkanRenderer : public DirectRenderer {
                  int highp_threshold_min);
   ~VulkanRenderer() override;
 
-  // Implementation of public Renderer functions.
-  const RendererCapabilitiesImpl& Capabilities() const override;
+  // Implementation of public DirectRenderer functions.
   void SwapBuffers(const CompositorFrameMetadata& metadata) override;
   void ReceiveSwapBuffersAck(const CompositorFrameAck& ack) override;
 
@@ -55,8 +54,6 @@ class CC_EXPORT VulkanRenderer : public DirectRenderer {
       std::unique_ptr<CopyOutputRequest> request) override;
 
  private:
-  RendererCapabilitiesImpl capabilities_;
-
   DISALLOW_COPY_AND_ASSIGN(VulkanRenderer);
 };