Add test for platform encoders, turn off platform encoders by default

src/ports/SkImageEncoder_WIC.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 
 #if defined(SK_BUILD_FOR_WIN32)
@@ skipping 32 matching lines @@
 //Undo this #define if it has been done so that we link against the symbols
 //we intended to link against on all SDKs.
 #if defined(CLSID_WICImagingFactory)
 #undef CLSID_WICImagingFactory
 #endif
 
 class SkImageEncoder_WIC : public SkImageEncoder {
 public:
     SkImageEncoder_WIC(Type t) : fType(t) {}
 
-    // DO NOT USE this constructor.  This exists only so SkForceLinking can
-    // link the WIC image encoder.
-    SkImageEncoder_WIC() {}
-
 protected:
     virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality);
 
 private:
     Type fType;
 };
 
 bool SkImageEncoder_WIC::onEncode(SkWStream* stream
                                 , const SkBitmap& bitmapOrig
                                 , int quality)
 {
     GUID type;
     switch (fType) {
-        case kBMP_Type:

[msarett, 2016/08/16 21:26:51]

These don't work.  I'm guessing that they've never worked (like our WIC JPEG
encoder...).  I think I'll delete them until somebody asks for this.

-            type = GUID_ContainerFormatBmp;
-            break;
-        case kICO_Type:
-            type = GUID_ContainerFormatIco;
-            break;
         case kJPEG_Type:
             type = GUID_ContainerFormatJpeg;
             break;
         case kPNG_Type:
             type = GUID_ContainerFormatPng;
             break;
         default:
             return false;
     }
 
@@ skipping 135 matching lines @@
 
     if (SUCCEEDED(hr)) {
         hr = piEncoder->Commit();
     }
 
     return SUCCEEDED(hr);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+#ifdef SK_USE_WIC_ENCODER
 static SkImageEncoder* sk_imageencoder_wic_factory(SkImageEncoder::Type t) {
     switch (t) {
-        case SkImageEncoder::kBMP_Type:
-        case SkImageEncoder::kICO_Type:
         case SkImageEncoder::kPNG_Type:
         case SkImageEncoder::kJPEG_Type:
             break;
         default:
             return nullptr;
     }
     return new SkImageEncoder_WIC(t);
 }
 
 static SkImageEncoder_EncodeReg gEReg(sk_imageencoder_wic_factory);
+#endif
 
-DEFINE_ENCODER_CREATOR(ImageEncoder_WIC);
+SkImageEncoder* CreateImageEncoder_WIC(SkImageEncoder::Type type) {
+    return new SkImageEncoder_WIC(type);
+}
 
 #endif // defined(SK_BUILD_FOR_WIN32)