Implement STYLE_LOWERCASE style for Aura NativeTextfield.

ui/views/controls/textfield/native_textfield_views.h

Index: ui/views/controls/textfield/native_textfield_views.h
diff --git a/ui/views/controls/textfield/native_textfield_views.h b/ui/views/controls/textfield/native_textfield_views.h
index 83341e1db521da1aa9fff5544a7080ebea6cbd33..2718c7c5b33acef413c6562061b66339bd79ce4a 100644
--- a/ui/views/controls/textfield/native_textfield_views.h
+++ b/ui/views/controls/textfield/native_textfield_views.h
@@ -197,7 +197,7 @@ class VIEWS_EXPORT NativeTextfieldViews : public TouchSelectionClientView,
   // changed.
   void UpdateAfterChange(bool text_changed, bool cursor_changed);
 
-  // Utility function to prepare the context menu..
+  // Utility function to prepare the context menu.
   void UpdateContextMenu();
 
   // Convenience method to call InputMethod::OnTextInputTypeChanged();
@@ -235,6 +235,9 @@ class VIEWS_EXPORT NativeTextfieldViews : public TouchSelectionClientView,
   // exceeds the drag threshold.
   bool ExceededDragThresholdFromLastClickLocation(const MouseEvent& event);
 
+  // Converts |text| to lower case if |textfield_| has STYLE_LOWERCASE style.
+  void MaybeLowerCase(string16* text);

[msw, 2012/04/12 16:15:29]

Please rename this GetTextForDisplay or similar for generalization.
That's more amenable to eventually supporting uppercase, password, etc.
Also, put this below GetRenderText at line 175 (same for the definition).

[kochi, 2012/04/13 09:44:09]

Done.

+
   // Checks if a char is ok to be inserted into the textfield. The |ch| is a
   // modified character, i.e., modifiers took effect when generating this char.
   static bool ShouldInsertChar(char16 ch, int flags);