cc: Delete the Renderer base class.

cc/output/software_renderer.h

Index: cc/output/software_renderer.h
diff --git a/cc/output/software_renderer.h b/cc/output/software_renderer.h
index 6fe7dfc79c26aee4736a6975b8b22056b7c68995..094c1955a4662c4773b1f83fa4f174d4af5f1782 100644
--- a/cc/output/software_renderer.h
+++ b/cc/output/software_renderer.h
@@ -9,17 +9,15 @@
 #include "cc/base/cc_export.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/direct_renderer.h"
+#include "cc/output/renderer_capabilities_impl.h"
 
 namespace cc {
-
-class OutputSurface;
-class RendererClient;
-class ResourceProvider;
-class SoftwareOutputDevice;
-
 class DebugBorderDrawQuad;
+class OutputSurface;
 class PictureDrawQuad;
 class RenderPassDrawQuad;
+class ResourceProvider;
+class SoftwareOutputDevice;
 class SolidColorDrawQuad;
 class TextureDrawQuad;
 class TileDrawQuad;