Add SkSpecialImage::extractSubset & NewFromPixmap

tests/DeviceLooperTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+#include "SkAutoPixmapStorage.h"
 #include "SkDeviceLooper.h"
 #include "SkRasterClip.h"
 #include "Test.h"
 
 static void make_pm(SkAutoPixmapStorage* pixmap, int w, int h) {
     pixmap->alloc(SkImageInfo::Make(w, h, kAlpha_8_SkColorType, kPremul_SkAlphaType));
 }
 
 static bool equal(const SkRasterClip& a, const SkRasterClip& b) {
     if (a.isBW()) {
@@ skipping 111 matching lines @@
                 REPORTER_ASSERT(reporter, !looper.getRC().isEmpty());
             }
         }
     }
 }
 
 DEF_TEST(DeviceLooper, reporter) {
     test_simple(reporter);
     test_complex(reporter);
 }