Revert of extract some common code from PictureRenderer

src/utils/SkDataUtils.h

-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkDataUtils_DEFINED
-#define SkDataUtils_DEFINED
-
-#include "SkData.h"
-#include "SkStream.h"
-
-/**
- * Static class that performs various operations on SkData objects.
- *
- * EPOGER: Before committing, add unittests for these methods.
- *
- * TODO(epoger): Move these methods into SkStream.[cpp|h], as attempted in
- * https://codereview.appspot.com/7300071 ?
- */
-class SkDataUtils {
-public:
-    /**
-     * Read as many bytes as possible (up to maxBytes) from the stream into
-     * an SkData object.
-     *
-     * If the returned SkData contains fewer than maxBytes, then EOF has been
-     * reached and no more data would be available from subsequent calls.
-     * (If EOF has already been reached, then this call will return an empty
-     * SkData object immediately.)
-     *
-     * If there are fewer than maxBytes bytes available to read from the
-     * stream, but the stream has not been closed yet, this call will block
-     * until there are enough bytes to read or the stream has been closed.
-     *
-     * It is up to the caller to call unref() on the returned SkData object
-     * once the data is no longer needed, so that the underlying buffer will
-     * be freed.  For example:
-     *
-     * {
-     *   size_t maxBytes = 256;
-     *   SkAutoDataUnref dataRef(readIntoSkData(stream, maxBytes));
-     *   if (NULL != dataRef.get()) {
-     *     size_t bytesActuallyRead = dataRef.get()->size();
-     *     // use the data...
-     *   }
-     * }
-     * // underlying buffer has been freed, thanks to auto unref
-     */
-    static SkData* ReadIntoSkData(SkStream &stream, size_t maxBytes);
-
-    /**
-     * Wrapper around ReadIntoSkData for files: reads the entire file into
-     * an SkData object.
-     */
-    static SkData* ReadFileIntoSkData(SkFILEStream &stream) {
-        return ReadIntoSkData(stream, stream.getLength());
-    }
-
-};
-
-#endif