Add PreferredSizeChanged() calls.

When a view changes size, it's important to call PreferredSizeChanged()
so that its parent knows it might need to re-layout or repaint.

The current code either fails to call PreferredSizeChanged() or instead
lays out the current view in a couple of cases relevant to the toolbar,
preventing us from using a consistent layout manager. This CL is a
prerequisite for actually switching to a layout manager for the toolbar.

Bug: 898632
Change-Id: I7154eb6ac58a11eca9069b25655a6c2666a704e0
Reviewed-on: https://chromium-review.googlesource.com/c/1372715
Commit-Queue: Dana Fried <dfried@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615969}

chrome/browser/ui/views/location_bar/location_bar_view.cc

@@ -1154,8 +1154,7 @@ void LocationBarView::OnTouchUiChanged() {
   if (save_credit_card_icon_view_)
     save_credit_card_icon_view_->SetFontList(font_list);
   location_icon_view_->Update(/*suppress_animations=*/false);
-  Layout();
-  SchedulePaint();
+  PreferredSizeChanged();
 }
 
 ////////////////////////////////////////////////////////////////////////////////

chrome/browser/ui/views/toolbar/browser_actions_container.cc

@@ -161,6 +161,7 @@ void BrowserActionsContainer::AddViewForAction(
   toolbar_action_views_.insert(toolbar_action_views_.begin() + index,
                                base::WrapUnique(view));
   AddChildViewAt(view, index);
+  PreferredSizeChanged();
 }
 
 void BrowserActionsContainer::RemoveViewForAction(
@@ -174,10 +175,12 @@ void BrowserActionsContainer::RemoveViewForAction(
       break;
     }
   }
+  PreferredSizeChanged();
 }
 
 void BrowserActionsContainer::RemoveAllViews() {
   toolbar_action_views_.clear();
+  PreferredSizeChanged();
 }
 
 void BrowserActionsContainer::Redraw(bool order_changed) {