Remove SkImageGenerator pieces only for SkCodec.

src/ports/SkImageGenerator_skia.cpp

 /*
  * Copyright 2015 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
 #include "SkImageDecoder.h"
 #include "SkImageGenerator.h"
@@ skipping 28 matching lines @@
 
 public:
     SkImageDecoderGenerator(const SkImageInfo& info, SkImageDecoder* decoder, SkData* data)
         : INHERITED(info), fInfo(info), fDecoder(decoder), fData(SkRef(data))
     {}
 
 protected:
     SkData* onRefEncodedData() override {
         return SkRef(fData.get());
     }
-
-    virtual Result onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
-                               const Options&,
-                               SkPMColor ctableEntries[], int* ctableCount) override {
+#ifdef SK_LEGACY_IMAGE_GENERATOR_ENUMS_AND_OPTIONS
+    Result onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
+                       const Options&,
+                       SkPMColor ctableEntries[], int* ctableCount) override {
+#else
+    bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
+                     SkPMColor ctableEntries[], int* ctableCount) override {
+#endif
         SkMemoryStream stream(fData->data(), fData->size(), false);
         SkAutoTUnref<BareMemoryAllocator> allocator(SkNEW_ARGS(BareMemoryAllocator,
                                                                (info, pixels, rowBytes)));
         fDecoder->setAllocator(allocator);
         fDecoder->setRequireUnpremultipliedColors(kUnpremul_SkAlphaType == info.alphaType());
 
         SkBitmap bm;
         const SkImageDecoder::Result result = fDecoder->decode(&stream, &bm, info.colorType(),
                                                                SkImageDecoder::kDecodePixels_Mode);
         if (SkImageDecoder::kFailure == result) {
+#ifdef SK_LEGACY_IMAGE_GENERATOR_ENUMS_AND_OPTIONS
             return kInvalidInput;
+#else
+            return false;
+#endif
         }
 
         SkASSERT(info.colorType() == bm.info().colorType());
 
         if (kIndex_8_SkColorType == info.colorType()) {
             SkASSERT(ctableEntries);
 
             SkColorTable* ctable = bm.getColorTable();
             if (NULL == ctable) {
+#ifdef SK_LEGACY_IMAGE_GENERATOR_ENUMS_AND_OPTIONS
                 return kInvalidConversion;
+#else
+                return false;
+#endif
             }
             const int count = ctable->count();
             memcpy(ctableEntries, ctable->readColors(), count * sizeof(SkPMColor));
             *ctableCount = count;
         }
+#ifdef SK_LEGACY_IMAGE_GENERATOR_ENUMS_AND_OPTIONS
         if (SkImageDecoder::kPartialSuccess == result) {
             return kIncompleteInput;
         }
         return kSuccess;
+#else
+        return true;
+#endif
     }
 
     bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
                          SkYUVColorSpace* colorSpace) override {
         SkMemoryStream stream(fData->data(), fData->size(), false);
         return fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
     }
 
 private:
     typedef SkImageGenerator INHERITED;
@@ skipping 12 matching lines @@
 
     SkBitmap bm;
     stream.rewind();
     if (!decoder->decode(&stream, &bm, kUnknown_SkColorType, SkImageDecoder::kDecodeBounds_Mode)) {
         SkDELETE(decoder);
         return NULL;
     }
 
     return SkNEW_ARGS(SkImageDecoderGenerator, (bm.info(), decoder, data));
 }