Added arrow key navigation to Overview Mode

ui/views/controls/label.cc

Index: ui/views/controls/label.cc
diff --git a/ui/views/controls/label.cc b/ui/views/controls/label.cc
index 7028df520c624eed4f967216999fe0dd76fd0d82..488999b14abbfee0402d094af7a1e8b6d3c7a4ba 100644
--- a/ui/views/controls/label.cc
+++ b/ui/views/controls/label.cc
@@ -312,7 +312,7 @@ bool Label::GetTooltipText(const gfx::Point& p, base::string16* tooltip) const {
 }
 
 void Label::GetAccessibleState(ui::AXViewState* state) {
-  state->role = ui::AX_ROLE_STATIC_TEXT;
+  state->role = accessible_role_;
   state->AddStateFlag(ui::AX_STATE_READ_ONLY);
   state->name = layout_text();
 }
@@ -383,6 +383,7 @@ void Label::OnNativeThemeChanged(const ui::NativeTheme* theme) {
 
 void Label::Init(const base::string16& text, const gfx::FontList& font_list) {
   font_list_ = font_list;
+  accessible_role_ = ui::AX_ROLE_STATIC_TEXT;
   enabled_color_set_ = disabled_color_set_ = background_color_set_ = false;
   auto_color_readability_ = true;
   UpdateColorsFromTheme(ui::NativeTheme::instance());