Add GetTextDirection to ui::TextInputClient API.

ui/base/ime/dummy_text_input_client.cc

Index: ui/base/ime/dummy_text_input_client.cc
diff --git a/ui/base/ime/dummy_text_input_client.cc b/ui/base/ime/dummy_text_input_client.cc
index ac9b97343ab9eb0203d80adf36b6900156d60973..373025e91460ef62e2c1288e905d2bfc6e4b4191 100644
--- a/ui/base/ime/dummy_text_input_client.cc
+++ b/ui/base/ime/dummy_text_input_client.cc
@@ -43,6 +43,10 @@ TextInputMode DummyTextInputClient::GetTextInputMode() const {
   return TEXT_INPUT_MODE_DEFAULT;
 }
 
+base::i18n::TextDirection DummyTextInputClient::GetTextDirection() const {
+  return base::i18n::UNKNOWN_DIRECTION;
+}
+
 int DummyTextInputClient::GetTextInputFlags() const {
   return 0;
 }