MacViews: Fix crash caused due to nil TextInputClient.

ui/views/cocoa/bridged_content_view.mm

Index: ui/views/cocoa/bridged_content_view.mm
diff --git a/ui/views/cocoa/bridged_content_view.mm b/ui/views/cocoa/bridged_content_view.mm
index a59d4f0788461572994df001532e34bd5fbccace..daa31a2e348716f94396f42846f84a4b7bebe4e8 100644
--- a/ui/views/cocoa/bridged_content_view.mm
+++ b/ui/views/cocoa/bridged_content_view.mm
@@ -81,7 +81,7 @@ bool DispatchEventToMenu(views::Widget* widget, ui::KeyboardCode key_code) {
 bool IsTextRTL(const ui::TextInputClient* client) {
   gfx::Range text_range;
   base::string16 text;
-  return client->GetTextRange(&text_range) &&
+  return client && client->GetTextRange(&text_range) &&
          client->GetTextFromRange(text_range, &text) &&
          base::i18n::GetStringDirection(text) == base::i18n::RIGHT_TO_LEFT;
 }