More implementation details of extension content verification

extensions/browser/content_hash_reader.cc

+// 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 "extensions/browser/content_hash_reader.h"
+
+namespace extensions {
+
+ContentHashReader::ContentHashReader(const std::string& extension_id,
+                                     const base::Version& extension_version,
+                                     const base::FilePath& extension_root,
+                                     const base::FilePath& relative_path,
+                                     const ContentVerifierKey& key)
+    : extension_id_(extension_id),
+      extension_version_(extension_version.GetString()),
+      extension_root_(extension_root),
+      relative_path_(relative_path),
+      key_(key) {
+}
+
+ContentHashReader::~ContentHashReader() {
+}
+
+bool ContentHashReader::Init() {
+  return true;
+}
+
+int ContentHashReader::block_count() const {
+  return 0;
+}
+
+int ContentHashReader::block_size() const {
+  return 0;
+}
+
+bool ContentHashReader::GetHashForBlock(int block_index,
+                                        const std::string** result) const {
+  return false;
+}
+
+}  // namespace extensions