Remove lots of old blur plumbing.

content/shell/browser/shell.cc

Index: content/shell/browser/shell.cc
diff --git a/content/shell/browser/shell.cc b/content/shell/browser/shell.cc
index 13a0dcb2c247d4f950df94b7f0dd33fcb70d6c9b..7d8ac38b6fa412982bba407b0f90db131f9f5356 100644
--- a/content/shell/browser/shell.cc
+++ b/content/shell/browser/shell.cc
@@ -402,10 +402,6 @@ void Shell::ActivateContents(WebContents* contents) {
   contents->GetRenderViewHost()->GetWidget()->Focus();
 }
 
-void Shell::DeactivateContents(WebContents* contents) {
-  contents->GetRenderViewHost()->GetWidget()->Blur();
-}
-
 bool Shell::HandleContextMenu(const content::ContextMenuParams& params) {
   return PlatformHandleContextMenu(params);
 }