Valgrind: Fix an uninit condition.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10821080

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149030 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/gtk/extensions/shell_window_gtk.cc

@@ -19,7 +19,8 @@ ShellWindowGtk::ShellWindowGtk(Profile* profile,
                                const ShellWindow::CreateParams& params)
     : ShellWindow(profile, extension, url),
       state_(GDK_WINDOW_STATE_WITHDRAWN),
-      is_active_(!ui::ActiveWindowWatcherX::WMSupportsActivation()) {
+      is_active_(!ui::ActiveWindowWatcherX::WMSupportsActivation()),
+      content_thinks_its_fullscreen_(false) {
   window_ = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
 
   gfx::NativeView native_view =