cc: Remove all blimp code from cc.

cc/blimp/engine_picture_cache.h

Index: cc/blimp/engine_picture_cache.h
diff --git a/cc/blimp/engine_picture_cache.h b/cc/blimp/engine_picture_cache.h
deleted file mode 100644
index d198b32ad7b7636536c88da708f53a3cc645625c..0000000000000000000000000000000000000000
--- a/cc/blimp/engine_picture_cache.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2016 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_BLIMP_ENGINE_PICTURE_CACHE_H_
-#define CC_BLIMP_ENGINE_PICTURE_CACHE_H_
-
-#include <vector>
-
-class SkPicture;
-
-namespace cc {
-struct PictureData;
-
-// EnginePictureCache provides functionaltiy for marking when SkPictures are in
-// use an when they stop being in use. Based on this, a PictureCacheUpdate can
-// be retrieved that includes all the new items since last time it was called.
-// This PictureCacheUpdate is then supposed to be sent to the client.
-class EnginePictureCache {
- public:
-  virtual ~EnginePictureCache() {}
-
-  // MarkUsed must be called when an SkPicture needs to available on the client.
-  virtual void MarkUsed(const SkPicture* picture) = 0;
-
-  // Called when a PictureCacheUpdate is going to be sent to the client. This
-  // must contain all the new SkPictures that are in use since last call.
-  virtual std::vector<PictureData> CalculateCacheUpdateAndFlush() = 0;
-};
-
-}  // namespace cc
-
-#endif  // CC_BLIMP_ENGINE_PICTURE_CACHE_H_