views: Make view::Views::GetPreferredSize() const.

ui/views/bubble/bubble_frame_view.cc

Index: ui/views/bubble/bubble_frame_view.cc
diff --git a/ui/views/bubble/bubble_frame_view.cc b/ui/views/bubble/bubble_frame_view.cc
index 1c4d70cc76ed90c98de89e469f0c8c7b23fb994b..8df63f1e48dc0269dca168f4c0af07557660d694 100644
--- a/ui/views/bubble/bubble_frame_view.cc
+++ b/ui/views/bubble/bubble_frame_view.cc
@@ -170,11 +170,11 @@ gfx::Insets BubbleFrameView::GetInsets() const {
   return insets;
 }
 
-gfx::Size BubbleFrameView::GetPreferredSize() {
+gfx::Size BubbleFrameView::GetPreferredSize() const {
   return GetSizeForClientSize(GetWidget()->client_view()->GetPreferredSize());
 }
 
-gfx::Size BubbleFrameView::GetMinimumSize() {
+gfx::Size BubbleFrameView::GetMinimumSize() const {
   return GetSizeForClientSize(GetWidget()->client_view()->GetMinimumSize());
 }
 
@@ -345,7 +345,8 @@ void BubbleFrameView::OffsetArrowIfOffScreen(const gfx::Rect& anchor_rect,
     SchedulePaint();
 }
 
-gfx::Size BubbleFrameView::GetSizeForClientSize(const gfx::Size& client_size) {
+gfx::Size BubbleFrameView::GetSizeForClientSize(
+    const gfx::Size& client_size) const {
   // Accommodate the width of the title bar elements.
   int title_bar_width = GetInsets().width() + border()->GetInsets().width();
   if (!title_->text().empty())