[NTP4] Add ExtensionSet::AddAll and ExtensionService::GetAllInstalledExtensions.

R=aa@chromium.org
TBR=estade@chromium.org
TEST=ExtensionsSetTest.ExtensionSet passes and nothing breaks.
BUG=97762


Review URL: http://codereview.chromium.org/9134003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118077 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 1 deletions

diff --git a/chrome/common/extensions/extension_set.cc b/chrome/common/extensions/extension_set.cc
index d6d18f7..f5aee9f 100644
--- a/chrome/common/extensions/extension_set.cc
+++ b/chrome/common/extensions/extension_set.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -41,6 +41,15 @@ void ExtensionSet::Insert(const scoped_refptr<const Extension>& extension) {
   extensions_[extension->id()] = extension;
 }
 
+bool ExtensionSet::InsertAll(const ExtensionSet& extensions) {
+  size_t before = size();
+  for (ExtensionSet::const_iterator iter = extensions.begin();
+       iter != extensions.end(); ++iter) {
+    Insert(*iter);
+  }
+  return size() != before;
+}
+
 void ExtensionSet::Remove(const std::string& id) {
   extensions_.erase(id);
 }