add SkBitmap::installPixelRef()

src/lazy/SkCachingPixelRef.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 "SkCachingPixelRef.h"
 #include "SkScaledImageCache.h"
 
 bool SkCachingPixelRef::Install(SkImageGenerator* generator,
                                 SkBitmap* dst) {
     SkImageInfo info;
     SkASSERT(dst != NULL);
-    if ((NULL == generator)
-        || !(generator->getInfo(&info))
-        || !dst->setConfig(info, 0)) {
+    if (!generator || !generator->getInfo(&info)) {
         SkDELETE(generator);
         return false;
     }
     SkAutoTUnref<SkCachingPixelRef> ref(SkNEW_ARGS(SkCachingPixelRef,
                                            (info, generator, dst->rowBytes())));
-    dst->setPixelRef(ref);
+    dst->installPixelRef(ref);
     return true;
 }
 
 SkCachingPixelRef::SkCachingPixelRef(const SkImageInfo& info,
                                      SkImageGenerator* generator,
                                      size_t rowBytes)
     : INHERITED(info)
     , fImageGenerator(generator)
     , fErrorInDecoding(false)
     , fScaledCacheId(NULL)
@@ skipping 54 matching lines @@
     rec->fColorTable = NULL;
     rec->fRowBytes = bitmap.rowBytes();
     return true;
 }
 
 void SkCachingPixelRef::onUnlockPixels() {
     SkASSERT(fScaledCacheId != NULL);
     SkScaledImageCache::Unlock( static_cast<SkScaledImageCache::ID*>(fScaledCacheId));
     fScaledCacheId = NULL;
 }