Remove bitmap reuse from SkImageDecoder.

src/images/SkImageDecoder.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 "SkImageDecoder.h"
 #include "SkBitmap.h"
@@ skipping 146 matching lines @@
         config = fDefaultPref;
     }
 
     if (SkBitmap::kNo_Config == config) {
         config = SkImageDecoder::GetDeviceConfig();
     }
     return config;
 }
 
 bool SkImageDecoder::decode(SkStream* stream, SkBitmap* bm,
-                            SkBitmap::Config pref, Mode mode, bool reuseBitmap) {
+                            SkBitmap::Config pref, Mode mode) {
     // we reset this to false before calling onDecode
     fShouldCancelDecode = false;
     // assign this, for use by getPrefConfig(), in case fUsePrefTable is false
     fDefaultPref = pref;
 
-    if (reuseBitmap) {
-        SkAutoLockPixels alp(*bm);
-        if (NULL != bm->getPixels()) {
-            return this->onDecode(stream, bm, mode);
-        }
-    }
-
     // pass a temporary bitmap, so that if we return false, we are assured of
     // leaving the caller's bitmap untouched.
     SkBitmap    tmp;
     if (!this->onDecode(stream, &tmp, mode)) {
         return false;
     }
     bm->swap(tmp);
     return true;
 }
 
@@ skipping 254 matching lines @@
             if (kUnknown_Format == *format) {
                 if (stream->rewind()) {
                     *format = GetStreamFormat(stream);
                 }
             }
         }
         delete codec;
     }
     return success;
 }