Remove parts of //cc we aren't using

cc/blink/web_external_bitmap_impl.cc

Index: cc/blink/web_external_bitmap_impl.cc
diff --git a/cc/blink/web_external_bitmap_impl.cc b/cc/blink/web_external_bitmap_impl.cc
deleted file mode 100644
index e2c67e4299693d27f54c46f902657e6b8847e7cf..0000000000000000000000000000000000000000
--- a/cc/blink/web_external_bitmap_impl.cc
+++ /dev/null
@@ -1,43 +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.
-
-#include "cc/blink/web_external_bitmap_impl.h"
-
-#include "cc/resources/shared_bitmap.h"
-
-namespace cc_blink {
-
-namespace {
-
-SharedBitmapAllocationFunction g_memory_allocator;
-
-}  // namespace
-
-void SetSharedBitmapAllocationFunction(
-    SharedBitmapAllocationFunction allocator) {
-  g_memory_allocator = allocator;
-}
-
-WebExternalBitmapImpl::WebExternalBitmapImpl() {
-}
-
-WebExternalBitmapImpl::~WebExternalBitmapImpl() {
-}
-
-void WebExternalBitmapImpl::setSize(blink::WebSize size) {
-  if (size != size_) {
-    shared_bitmap_ = g_memory_allocator(gfx::Size(size));
-    size_ = size;
-  }
-}
-
-blink::WebSize WebExternalBitmapImpl::size() {
-  return size_;
-}
-
-uint8* WebExternalBitmapImpl::pixels() {
-  return shared_bitmap_->pixels();
-}
-
-}  // namespace cc_blink