Resubmit of 149313003: Significantly cleans up the ImageWriter Operation class and subclasses.

chrome/browser/extensions/api/image_writer_private/image_writer_utils.cc

Index: chrome/browser/extensions/api/image_writer_private/image_writer_utils.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/image_writer_utils.cc b/chrome/browser/extensions/api/image_writer_private/image_writer_utils.cc
deleted file mode 100644
index 1c0a36b642b5e57819eec9cb921e3824df648293..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/image_writer_private/image_writer_utils.cc
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/logging.h"
-#include "chrome/browser/extensions/api/image_writer_private/image_writer_utils.h"
-
-namespace extensions {
-namespace image_writer_utils
-{
-
-const int kFsyncRatio = 1024;
-
-ImageWriter::ImageWriter() : file_(base::kInvalidPlatformFileValue),
-                             writes_count_(0) {
-}
-
-ImageWriter::~ImageWriter() {
-  if (file_ != base::kInvalidPlatformFileValue)
-    base::ClosePlatformFile(file_);
-}
-
-bool ImageWriter::Open(const base::FilePath& path) {
-  if (file_ != base::kInvalidPlatformFileValue)
-    Close();
-  DCHECK_EQ(base::kInvalidPlatformFileValue, file_);
-  base::PlatformFileError error;
-  file_ = base::CreatePlatformFile(
-    path,
-    base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_WRITE,
-    NULL,
-    &error);
-  if (error != base::PLATFORM_FILE_OK) {
-    LOG(ERROR) << "Couldn't open target path "
-               << path.value() << ": " << error;
-    return false;
-  }
-  return true;
-}
-
-bool ImageWriter::Close() {
-  if (file_ != base::kInvalidPlatformFileValue &&
-      base::ClosePlatformFile(file_)) {
-    file_ = base::kInvalidPlatformFileValue;
-    return true;
-  } else {
-    LOG(ERROR) << "Could not close target file";
-    return false;
-  }
-}
-
-int ImageWriter::Write(const char* data_block, int data_size) {
-  int written = base::WritePlatformFileAtCurrentPos(file_, data_block,
-                                                    data_size);
-  if (written != data_size) {
-    LOG(ERROR) << "Error writing to target file";
-    return -1;
-  }
-
-  writes_count_++;
-  if (writes_count_ == kFsyncRatio) {
-    if (!base::FlushPlatformFile(file_)) {
-      LOG(ERROR) << "Error syncing target file";
-      return -1;
-    }
-    writes_count_ = 0;
-  }
-
-  return written;
-}
-
-ImageReader::ImageReader() : file_(base::kInvalidPlatformFileValue) {
-}
-
-ImageReader::~ImageReader() {
-  if (file_ != base::kInvalidPlatformFileValue)
-    base::ClosePlatformFile(file_);
-}
-
-bool ImageReader::Open(const base::FilePath& path) {
-  if (file_ != base::kInvalidPlatformFileValue)
-    Close();
-  DCHECK_EQ(base::kInvalidPlatformFileValue, file_);
-  base::PlatformFileError error;
-  file_ = base::CreatePlatformFile(
-    path,
-    base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
-    NULL,
-    &error);
-  if (error != base::PLATFORM_FILE_OK) {
-    LOG(ERROR) << "Couldn't open target path "
-               << path.value() << ": " << error;
-    return false;
-  }
-  return true;
-}
-
-bool ImageReader::Close() {
-  if (file_ != base::kInvalidPlatformFileValue &&
-      base::ClosePlatformFile(file_)) {
-    file_ = base::kInvalidPlatformFileValue;
-    return true;
-  } else {
-    LOG(ERROR) << "Could not close target file";
-    return false;
-  }
-  return true;
-}
-
-int ImageReader::Read(char* data_block, int data_size) {
-  int read = base::ReadPlatformFileAtCurrentPos(file_, data_block, data_size);
-  if (read < 0)
-    LOG(ERROR) << "Error reading from source file";
-  return read;
-}
-
-int64 ImageReader::GetSize() {
-  base::PlatformFileInfo info;
-  if (base::GetPlatformFileInfo(file_, &info)) {
-    return info.size;
-  } else {
-    return 0;
-  }
-}
-
-} // namespace image_writer_utils
-} // namespace extensions