Remove parts of //cc we aren't using

cc/layers/solid_color_layer.h

Index: cc/layers/solid_color_layer.h
diff --git a/cc/layers/solid_color_layer.h b/cc/layers/solid_color_layer.h
deleted file mode 100644
index 8dc986075a50563c80c5f079cc7ef1a69a12f182..0000000000000000000000000000000000000000
--- a/cc/layers/solid_color_layer.h
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-
-#ifndef CC_LAYERS_SOLID_COLOR_LAYER_H_
-#define CC_LAYERS_SOLID_COLOR_LAYER_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/layers/layer.h"
-
-namespace cc {
-
-// A Layer that renders a solid color. The color is specified by using
-// SetBackgroundColor() on the base class.
-class CC_EXPORT SolidColorLayer : public Layer {
- public:
-  static scoped_refptr<SolidColorLayer> Create();
-
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
-
-  void SetBackgroundColor(SkColor color) override;
-
- protected:
-  SolidColorLayer();
-
- private:
-  ~SolidColorLayer() override;
-
-  DISALLOW_COPY_AND_ASSIGN(SolidColorLayer);
-};
-
-}  // namespace cc
-#endif  // CC_LAYERS_SOLID_COLOR_LAYER_H_