Merge SkCodec with SkScanlineDecoder

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 293 matching lines @@
             continue;
         }
 
         for (CodecSrc::Mode mode : nativeModes) {
             for (uint32_t i = 0; i < numColorTypes; i++) {
                 push_codec_src(path, mode, colorTypes[i], scale);
             }
         }
     }
 
+    if (path.endsWith(".ico") || path.endsWith(".ICO")) {
+        // FIXME: skbug.com/4404: ICO does not have the ability to decode scanlines, so we cannot
+        // use SkScaledCodec with it.
+        return;
+    }
+
     // SkScaledCodec Scales
     // The native scales are included to make sure that SkScaledCodec defaults to the native
     // scaling strategy when possible.
     // 0.1, 0.16, 0.2 etc allow us to test SkScaledCodec with sampleSize 10, 6, 5, etc.
     // 0.4, 0.7 etc allow to test what happens when the client requests a scale that
     // does not exactly match a sampleSize or native scaling capability.
     const float samplingScales[] = { 0.1f, 0.125f, 0.167f, 0.2f, 0.25f, 0.333f, 0.375f, 0.4f, 0.5f,
             0.6f, 0.625f, 0.750f, 0.8f, 0.875f, 1.0f };
 
     for (float scale : samplingScales) {
@@ skipping 777 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif