Coverity: Fixing pass by value.
CID=101462, 101458, 101437, 101471, 101467

BUG=NONE
TEST=NONE

Review URL: http://codereview.chromium.org/9006023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@115257 0039d316-1c4b-4281-b951-d872f2087c98
ExtensionPrefs::ExtensionPrefs(
    PrefService* prefs,
    const FilePath& root_dir,
    ExtensionPrefValueMap* extension_pref_value_map)
    : prefs_(prefs),
      install_directory_(root_dir),
      extension_pref_value_map_(extension_pref_value_map),
      content_settings_store_(new ExtensionContentSettingsStore()) {
}

ExtensionPrefs::ExtensionPrefs(
    PrefService* prefs,
    const FilePath& root_dir,
    ExtensionPrefValueMap* extension_pref_value_map)
    : prefs_(prefs),
      install_directory_(root_dir),
      extension_pref_value_map_(extension_pref_value_map),
      content_settings_store_(new ExtensionContentSettingsStore()) {
}
