BridgedContentView: Modify IsTextRTL to use TextInputClient::GetTextDirection.

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 7fe03cabdef92cc789699397a56e080bc203f291..8fee59789212ae11a008b5608318c37580d6a7bf 100644
--- a/ui/views/cocoa/bridged_content_view.mm
+++ b/ui/views/cocoa/bridged_content_view.mm
@@ -84,12 +84,7 @@ bool DispatchEventToMenu(views::Widget* widget, ui::KeyboardCode key_code) {
 
 // Returns true if |client| has RTL text.
 bool IsTextRTL(const ui::TextInputClient* client) {
-  gfx::Range text_range;
-  base::string16 text;
-  return client && client->GetTextRange(&text_range) &&
-         client->GetTextFromRange(text_range, &text) &&
-         base::i18n::GetFirstStrongCharacterDirection(text) ==
-             base::i18n::RIGHT_TO_LEFT;
+  return client && client->GetTextDirection() == base::i18n::RIGHT_TO_LEFT;
 }
 
 // Returns the boundary rectangle for composition characters in the