make allocPixels throw on failure

src/images/SkMovie_gif.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkMovie.h"
@@ skipping 346 matching lines @@
         return true;
     }
 
     int startIndex = fLastDrawIndex + 1;
     if (fLastDrawIndex < 0 || !bm->readyToDraw()) {
         // first time
 
         startIndex = 0;
 
         // create bitmap
-        if (!bm->allocPixels(SkImageInfo::MakeN32Premul(width, height))) {
+        if (!bm->tryAllocN32Pixels(width, height)) {
             return false;
         }
         // create bitmap for backup
-        if (!fBackup.allocPixels(SkImageInfo::MakeN32Premul(width, height))) {
+        if (!fBackup.tryAllocN32Pixels(width, height)) {
             return false;
         }
     } else if (startIndex > fCurrIndex) {
         // rewind to 1st frame for repeat
         startIndex = 0;
     }
 
     int lastIndex = fCurrIndex;
     if (lastIndex < 0) {
         // first time
@@ skipping 56 matching lines @@
                 memcmp(GIF89_STAMP, buf, GIF_STAMP_LEN) == 0) {
             // must rewind here, since our construct wants to re-read the data
             stream->rewind();
             return SkNEW_ARGS(SkGIFMovie, (stream));
         }
     }
     return NULL;
 }
 
 static SkTRegistry<SkMovie*(*)(SkStreamRewindable*)> gReg(Factory);