Fix some SkCodecPrintfs

src/codec/SkCodec.cpp

Index: src/codec/SkCodec.cpp
diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index 87a7ded7dd6bd2e0c0a6da19de1d9782a50553c3..0736f2a2691698180399971b3337aeccec5fc050 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -62,13 +62,16 @@ SkCodec* SkCodec::NewFromStream(SkStream* stream,
     // we trust the caller to use a large enough buffer.
 
     if (0 == bytesRead) {
-        SkCodecPrintf("Could not peek!\n");
+        // TODO: After implementing peek in CreateJavaOutputStreamAdaptor.cpp, this
+        // printf could be useful to notice failures.
+        // SkCodecPrintf("Encoded image data failed to peek!\n");
+
         // It is possible the stream does not support peeking, but does support
         // rewinding.
         // Attempt to read() and pass the actual amount read to the decoder.
         bytesRead = stream->read(buffer, bytesToRead);
         if (!stream->rewind()) {
-            SkCodecPrintf("Could not rewind!\n");
+            SkCodecPrintf("Encoded image data could not peek or rewind to determine format!\n");

[scroggo, 2016/01/06 16:57:52]

I could imagine making SkCodecPrintf add something that identifies it as codec
related.

[msarett, 2016/01/06 17:11:27]

Yes I agree.

             return nullptr;
         }
     }