Cache gfx::RenderText instances in views::Label.

chrome/browser/ui/views/tabs/tab.cc

Index: chrome/browser/ui/views/tabs/tab.cc
diff --git a/chrome/browser/ui/views/tabs/tab.cc b/chrome/browser/ui/views/tabs/tab.cc
index 29841163c87a34db0b811cabbf7030e9156b44aa..353542ad90ade0f9be07f50855e8a9b55793fa49 100644
--- a/chrome/browser/ui/views/tabs/tab.cc
+++ b/chrome/browser/ui/views/tabs/tab.cc
@@ -439,6 +439,7 @@ Tab::Tab(TabController* controller)
   title_->SetElideBehavior(gfx::FADE_TAIL);
   title_->SetHandlesTooltips(false);
   title_->SetAutoColorReadabilityEnabled(false);
+  title_->set_collapse_when_hidden(true);
   title_->SetText(CoreTabHelper::GetDefaultTitle());
   AddChildView(title_);
 
@@ -812,7 +813,7 @@ void Tab::Layout() {
           kViewSpacing - title_left;
     }
     gfx::Rect rect(title_left, lb.y(), std::max(title_width, 0), lb.height());
-    const int title_height = title_->GetPreferredSize().height();
+    const int title_height = title_->GetHeightForWidth(title_width);
     if (title_height > rect.height()) {
       rect.set_y(lb.y() - (title_height - rect.height()) / 2);
       rect.set_height(title_height);