Add onImageInfo call to SkImage_Base.

src/image/SkImage_Raster.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 56 matching lines @@
 
         if (minSize) {
             *minSize = size;
         }
         return true;
     }
 
     SkImage_Raster(const SkImageInfo&, sk_sp<SkData>, size_t rb, SkColorTable*);
     virtual ~SkImage_Raster();
 
+    SkImageInfo onImageInfo() const override {
+        return fBitmap.info();
+    }
+
     bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY, CachingHint) const override;
     bool onPeekPixels(SkPixmap*) const override;
     SkData* onRefEncoded(GrContext*) const override;
     bool getROPixels(SkBitmap*, CachingHint) const override;
     GrTexture* asTextureRef(GrContext*, const GrTextureParams&) const override;
     sk_sp<SkImage> onMakeSubset(const SkIRect&) const override;
 
     // exposed for SkSurface_Raster via SkNewImageFromPixelRef
     SkImage_Raster(const SkImageInfo&, SkPixelRef*, const SkIPoint& origin, size_t rowBytes);
 
@@ skipping 84 matching lines @@
 }
 
 GrTexture* SkImage_Raster::asTextureRef(GrContext* ctx, const GrTextureParams& params) const {
 #if SK_SUPPORT_GPU
     if (!ctx) {
         return nullptr;
     }
 
     return GrRefCachedBitmapTexture(ctx, fBitmap, params);
 #endif
-    
+
     return nullptr;
 }
 
 sk_sp<SkImage> SkImage_Raster::onMakeSubset(const SkIRect& subset) const {
     // TODO : could consider heurist of sharing pixels, if subset is pretty close to complete
 
     SkImageInfo info = SkImageInfo::MakeN32(subset.width(), subset.height(), fBitmap.alphaType());
     auto surface(SkSurface::MakeRaster(info));
     if (!surface) {
         return nullptr;
@@ skipping 96 matching lines @@
         // pixelref since the caller might call setImmutable() themselves
         // (thus changing our state).
         if (fBitmap.isImmutable()) {
             bitmap->setInfo(fBitmap.info(), fBitmap.rowBytes());
             bitmap->setPixelRef(fBitmap.pixelRef(), fBitmap.pixelRefOrigin());
             return true;
         }
     }
     return this->INHERITED::onAsLegacyBitmap(bitmap, mode);
 }