More implementation details of extension content verification

extensions/browser/content_hash_fetcher.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_fetcher.h"
+
+#include "extensions/browser/extension_registry.h"
+
+namespace extensions {
+
+ContentHashFetcher::ContentHashFetcher(content::BrowserContext* context,
+                                       ContentVerifierDelegate* delegate)
+    : context_(context), delegate_(delegate), observer_(this) {
+}
+
+ContentHashFetcher::~ContentHashFetcher() {
+}
+
+void ContentHashFetcher::Start() {
+  ExtensionRegistry* registry = ExtensionRegistry::Get(context_);
+  observer_.Add(registry);
+}
+
+void ContentHashFetcher::DoFetch(const Extension* extension) {
+}
+
+void ContentHashFetcher::OnExtensionLoaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension) {
+}
+
+void ContentHashFetcher::OnExtensionUnloaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension,
+    UnloadedExtensionInfo::Reason reason) {
+}
+
+}  // namespace extensions