render_pictures: add --mismatchPath flag

tools/picture_utils.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef picture_utils_DEFINED
 #define picture_utils_DEFINED
 
@@ skipping 35 matching lines @@
     void get_basename(SkString* basename, const SkString& path);
 
     // Returns true if the string ends with %
     bool is_percentage(const char* const string);
 
     // Prepares the bitmap so that it can be written.
     //
     // Specifically, it configures the bitmap, allocates pixels and then
     // erases the pixels to transparent black.
     void setup_bitmap(SkBitmap* bitmap, int width, int height);
-}
+
+    /**
+     * Write a bitmap file to disk.
+     *
+     * @param bm the bitmap to record
+     * @param dirPath directory within which to write the image file
+     * @param subdirOrNull subdirectory within dirPath, or NULL to just write into dirPath
+     * @param baseName last part of the filename
+     *
+     * @return true if written out successfully
+     */
+    bool write_bitmap_to_disk(const SkBitmap& bm, const SkString& dirPath,
+                              const char *subdirOrNull, const SkString& baseName);
+
+} // namespace sk_tools
 
 #endif  // picture_utils_DEFINED