Remove parts of //cc we aren't using

cc/blink/context_provider_web_context.h

Index: cc/blink/context_provider_web_context.h
diff --git a/cc/blink/context_provider_web_context.h b/cc/blink/context_provider_web_context.h
deleted file mode 100644
index 21d1df380e26bc58587af467e9ae865a0fac3359..0000000000000000000000000000000000000000
--- a/cc/blink/context_provider_web_context.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2014 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_BLINK_CONTEXT_PROVIDER_WEB_CONTEXT_H_
-#define CC_BLINK_CONTEXT_PROVIDER_WEB_CONTEXT_H_
-
-#include "cc/output/context_provider.h"
-
-namespace blink { class WebGraphicsContext3D; }
-
-namespace cc_blink {
-
-class ContextProviderWebContext : public cc::ContextProvider {
- public:
-  virtual blink::WebGraphicsContext3D* WebContext3D() = 0;
-
- protected:
-  ~ContextProviderWebContext() override {}
-};
-
-}  // namespace cc_blink
-
-#endif  // CC_BLINK_CONTEXT_PROVIDER_WEB_CONTEXT_H_