Deinline even more destructors.

chrome/browser/tab_contents/background_contents.cc

Index: chrome/browser/tab_contents/background_contents.cc
diff --git a/chrome/browser/tab_contents/background_contents.cc b/chrome/browser/tab_contents/background_contents.cc
index 96ed7af50488cbb106f8fa683bc227cdf5d92069..1904d3819b24352387248838c0652ed967fedb1b 100644
--- a/chrome/browser/tab_contents/background_contents.cc
+++ b/chrome/browser/tab_contents/background_contents.cc
@@ -147,6 +147,14 @@ gfx::NativeWindow BackgroundContents::GetMessageBoxRootWindow() {
   return NULL;
 }
 
+TabContents* BackgroundContents::AsTabContents() {
+  return NULL;
+}
+
+ExtensionHost* BackgroundContents::AsExtensionHost() {
+  return NULL;
+}
+
 void BackgroundContents::UpdateInspectorSetting(const std::string& key,
                                          const std::string& value) {
   Profile* profile = render_view_host_->process()->profile();