Only run kStripe_Mode on JPEGs

dm/DM.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 "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 490 matching lines @@
             nativeModes.push_back(CodecSrc::kStripe_Mode);
             nativeModes.push_back(CodecSrc::kCroppedScanline_Mode);
             break;
         case SkEncodedFormat::kWEBP_SkEncodedFormat:
             nativeModes.push_back(CodecSrc::kSubset_Mode);
             break;
         case SkEncodedFormat::kDNG_SkEncodedFormat:
             break;
         default:
             nativeModes.push_back(CodecSrc::kScanline_Mode);
-            nativeModes.push_back(CodecSrc::kStripe_Mode);
             break;
     }
 
     SkTArray<CodecSrc::DstColorType> colorTypes;
     colorTypes.push_back(CodecSrc::kGetFromCanvas_DstColorType);
     colorTypes.push_back(CodecSrc::kNonNative8888_Always_DstColorType);
     switch (codec->getInfo().colorType()) {
         case kGray_8_SkColorType:
             colorTypes.push_back(CodecSrc::kGrayscale_Always_DstColorType);
             if (kWBMP_SkEncodedFormat == codec->getEncodedFormat()) {
@@ skipping 928 matching lines @@
 #endif
 }
 } // namespace skiatest
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif