add fsync to try to get complete skps from webpage picture capture

src/core/SkStream.cpp

 
 /*
  * Copyright 2006 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 "SkStream.h"
@@ skipping 445 matching lines @@
     return true;
 }
 
 void SkFILEWStream::flush()
 {
     if (fFILE) {
         sk_fflush(fFILE);
     }
 }
 
+void SkFILEWStream::fsync()
+{
+    flush();
+    if (fFILE) {
+        sk_fsync(fFILE);
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////
 
 SkMemoryWStream::SkMemoryWStream(void* buffer, size_t size)
     : fBuffer((char*)buffer), fMaxLength(size), fBytesWritten(0)
 {
 }
 
 bool SkMemoryWStream::write(const void* buffer, size_t size) {
     size = SkTMin(size, fMaxLength - fBytesWritten);
     if (size > 0) {
@@ skipping 493 matching lines @@
     while (true) {
         count = input->read(scratch, sizeof(scratch));
         if (0 == count) {
             return true;
         }
         if (!out->write(scratch, count)) {
             return false;
         }
     }
 }