Show ChromeVox caption panel when spoken feedback is enabled.

ash/shelf/shelf_layout_manager.cc

Index: ash/shelf/shelf_layout_manager.cc
diff --git a/ash/shelf/shelf_layout_manager.cc b/ash/shelf/shelf_layout_manager.cc
index 5e1aab01e84749a9e1ec42bf9fab99df80031511..b48d5f7cfc48471ccfb74e89b16c9884cdac66f5 100644
--- a/ash/shelf/shelf_layout_manager.cc
+++ b/ash/shelf/shelf_layout_manager.cc
@@ -541,6 +541,10 @@ bool ShelfLayoutManager::IsHorizontalAlignment() const {
          GetAlignment() == SHELF_ALIGNMENT_TOP;
 }
 
+gfx::Insets ShelfLayoutManager::GetWorkAreaInsets() const {
+  return work_area_insets_;
+}
+
 // static
 ShelfLayoutManager* ShelfLayoutManager::ForShelf(aura::Window* window) {
   ShelfWidget* shelf = RootWindowController::ForShelf(window)->shelf();
@@ -704,14 +708,15 @@ void ShelfLayoutManager::UpdateBoundsAndOpacity(
             shelf_->status_area_widget()->GetNativeView()->parent(),
             status_bounds));
     if (!state_.is_screen_locked) {
-      gfx::Insets insets;
       // If user session is blocked (login to new user session or add user to
       // the existing session - multi-profile) then give 100% of work area only
       // if keyboard is not shown.
       if (!state_.is_adding_user_screen || !keyboard_bounds_.IsEmpty()) {
-        insets = target_bounds.work_area_insets;
+        work_area_insets_ = target_bounds.work_area_insets;
+      } else {
+        work_area_insets_ = gfx::Insets();
       }
-      Shell::GetInstance()->SetDisplayWorkAreaInsets(root_window_, insets);
+      Shell::GetInstance()->UpdateDisplayWorkAreaInsets(root_window_);
     }
   }
 
@@ -1131,7 +1136,8 @@ void ShelfLayoutManager::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
   // window.
   if (session_state_delegate->IsUserSessionBlocked() &&
       keyboard_is_about_to_hide) {
-    Shell::GetInstance()->SetDisplayWorkAreaInsets(root_window_, gfx::Insets());
+    work_area_insets_ = gfx::Insets();
+    Shell::GetInstance()->UpdateDisplayWorkAreaInsets(root_window_);
   }
 }