Call rewindIfNeeded in SkCodec

src/codec/SkJpegCodec.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 "SkJpegCodec.h"
 #include "SkJpegDecoderMgr.h"
@@ skipping 285 matching lines @@
     }
     return true;
 }
 
 /*
  * Performs the jpeg decode
  */
 SkCodec::Result SkJpegCodec::onGetPixels(const SkImageInfo& dstInfo,
                                          void* dst, size_t dstRowBytes,
                                          const Options& options, SkPMColor*, int*) {
-    // Rewind the stream if needed
-    if (!this->rewindIfNeeded()) {
-        return fDecoderMgr->returnFailure("could not rewind stream", kCouldNotRewind);
-    }
-
     if (options.fSubset) {
         // Subsets are not supported.
         return kUnimplemented;
     }
 
     // Get a pointer to the decompress info since we will use it quite frequently
     jpeg_decompress_struct* dinfo = fDecoderMgr->dinfo();
 
     // Set the jump location for libjpeg errors
     if (setjmp(fDecoderMgr->getJmpBuf())) {
@@ skipping 84 matching lines @@
                                                this->getInfo()));
     if (!fSwizzler) {
         return SkCodec::kUnimplemented;
     }
 
     return kSuccess;
 }
 
 SkCodec::Result SkJpegCodec::onStartScanlineDecode(const SkImageInfo& dstInfo,
         const Options& options, SkPMColor ctable[], int* ctableCount) {
-    // Rewind the stream if needed
-    if (!this->rewindIfNeeded()) {
-        return kCouldNotRewind;
-    }
-
     // Set the jump location for libjpeg errors
     if (setjmp(fDecoderMgr->getJmpBuf())) {
         SkCodecPrintf("setjmp: Error from libjpeg\n");
         return kInvalidInput;
     }
 
     // Check if we can decode to the requested destination and set the output color space
     if (!this->setOutputColorSpace(dstInfo)) {
         return kInvalidConversion;
     }
@@ skipping 97 matching lines @@
     // Set the jump location for libjpeg errors
     if (setjmp(fDecoderMgr->getJmpBuf())) {
         return fDecoderMgr->returnFailure("setjmp", kInvalidInput);
     }
 
     jpeg_skip_scanlines(fDecoderMgr->dinfo(), count);
 
     return kSuccess;
 }