Qualify the return value of SkImageDecoder::decode

bench/SkipZeroesBench.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 "Benchmark.h"
 #include "Resources.h"
 #include "SkBitmap.h"
@@ skipping 65 matching lines @@
     virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         if (!fValid) {
 #ifdef SK_DEBUG
             SkDebugf("stream was invalid: %s\n", fFilename.c_str());
 #endif
             return;
         }
         // Decode a bunch of times
         SkBitmap bm;
         for (int i = 0; i < loops; ++i) {
-            SkDEBUGCODE(bool success =) fDecoder->decode(&fStream, &bm,
-                                                         SkImageDecoder::kDecodePixels_Mode);
+            SkDEBUGCODE(SkImageDecoder::Result result =) fDecoder->decode(&fStream, &bm,
+                    SkImageDecoder::kDecodePixels_Mode);
 #ifdef SK_DEBUG
-            if (!success) {
+            if (SkImageDecoder::kFailure == result) {
                 SkDebugf("failed to decode %s\n", fFilename.c_str());
                 return;
             }
 #endif
-            SkDEBUGCODE(success =) fStream.rewind();
+            SkDEBUGCODE(bool success =) fStream.rewind();
 #ifdef SK_DEBUG
             if (!success) {
                 SkDebugf("failed to rewind %s\n", fFilename.c_str());
                 return;
             }
 #endif
         }
     }
 
 private:
     SkString                        fName;
     SkAutoTDelete<SkImageDecoder>   fDecoder;
     const SkString                  fFilename;
     SkMemoryStream                  fStream;
     bool                            fSkipZeroes;
     bool                            fValid;
 
     typedef Benchmark INHERITED;
 };
 
 // Enable the true version once the feature is checked in.
 DEF_BENCH( return SkNEW_ARGS(SkipZeroesBench, ("arrow.png", true)));
 DEF_BENCH( return SkNEW_ARGS(SkipZeroesBench, ("arrow.png", false)));