Call rewindIfNeeded in SkCodec

src/codec/SkCodec_wbmp.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
@@ skipping 92 matching lines @@
 SkEncodedFormat SkWbmpCodec::onGetEncodedFormat() const {
     return kWBMP_SkEncodedFormat;
 }
 
 SkCodec::Result SkWbmpCodec::onGetPixels(const SkImageInfo& info,
                                          void* dst,
                                          size_t rowBytes,
                                          const Options& options,
                                          SkPMColor ctable[],
                                          int* ctableCount) {
-    if (!this->rewindIfNeeded()) {
-        return kCouldNotRewind;
-    }
     if (options.fSubset) {
         // Subsets are not supported.
         return kUnimplemented;
     }
     if (info.dimensions() != this->getInfo().dimensions()) {
         return kInvalidScale;
     }
 
     if (!valid_alpha(info.alphaType(), this->getInfo().alphaType())) {
         return kInvalidConversion;
@@ skipping 47 matching lines @@
             return rowResult;
         }
         fSwizzler->swizzle(dstRow, fSrcBuffer.get());
         dstRow = SkTAddOffset<void>(dstRow, dstRowBytes);
     }
     return kSuccess;
 }
 
 SkCodec::Result SkWbmpCodec::onStartScanlineDecode(const SkImageInfo& dstInfo,
         const Options& options, SkPMColor inputColorTable[], int* inputColorCount) {
-    if (!this->rewindIfNeeded()) {
-        return kCouldNotRewind;
-    }
     if (options.fSubset) {
         // Subsets are not supported.
         return kUnimplemented;
     }
     if (dstInfo.dimensions() != this->getInfo().dimensions()) {
         if (!SkScaledCodec::DimensionsSupportedForSampling(this->getInfo(), dstInfo)) {
                 return kInvalidScale;
         }
     }
 
@@ skipping 14 matching lines @@
             get_color_ptr(fColorTable.get()), options));
     if (nullptr == fSwizzler.get()) {
         return kInvalidConversion;
     }
 
     fSrcBuffer.reset(fSrcRowBytes);
 
     return kSuccess;
 }