Initialize member in BackgroundContents.

BUG=None
TEST=None
CID=12578

Review URL: http://codereview.chromium.org/3166025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56989 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/tab_contents/background_contents.cc

@@ -47,7 +47,8 @@ BackgroundContents::BackgroundContents(SiteInstance* site_instance,
 
 // Exposed to allow creating mocks.
 BackgroundContents::BackgroundContents()
-    : render_view_host_(NULL) {
+    : delegate_(NULL),
+      render_view_host_(NULL) {
 }
 
 void BackgroundContents::Observe(NotificationType type,