[content shell] don't require a user action for focus/blur events during layout tests

content/shell/shell.cc

Index: content/shell/shell.cc
diff --git a/content/shell/shell.cc b/content/shell/shell.cc
index 0a92aff947bd1a97e52a2ac269583484c8da836c..8744d31106c156118924c3d329083866ea67ef7f 100644
--- a/content/shell/shell.cc
+++ b/content/shell/shell.cc
@@ -288,6 +288,14 @@ void Shell::RendererUnresponsive(WebContents* source) {
   WebKitTestController::Get()->RendererUnresponsive();
 }
 
+void Shell::ActivateContents(WebContents* contents) {
+  contents->GetRenderViewHost()->Focus();
+}
+
+void Shell::DeactivateContents(WebContents* contents) {
+  contents->GetRenderViewHost()->Blur();
+}
+
 void Shell::Observe(int type,
                     const NotificationSource& source,
                     const NotificationDetails& details) {