A number of paint optimizations to improve overall paint times.

chrome/browser/ui/views/status_bubble_views.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/status_bubble_views.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/i18n/rtl.h"
@@ skipping 174 matching lines @@
   ui::ThemeProvider* theme_service_;
 };
 
 void StatusBubbleViews::StatusView::SetText(const string16& text,
                                             bool should_animate_open) {
   if (text.empty()) {
     // The string was empty.
     StartHiding();
   } else {
     // We want to show the string.
-    text_ = text;
+    if (text != text_) {
+      text_ = text;
+      SchedulePaint();
+    }
     if (should_animate_open)
       StartShowing();
   }
-
-  SchedulePaint();
 }
 
 void StatusBubbleViews::StatusView::Show() {
   Stop();
   CancelTimer();
   SetOpacity(1.0);
   popup_->Show();
   stage_ = BUBBLE_SHOWN;
 }
 
@@ skipping 637 matching lines @@
 void StatusBubbleViews::SetBubbleWidth(int width) {
   size_.set_width(width);
   SetBounds(original_position_.x(), original_position_.y(),
             size_.width(), size_.height());
 }
 
 void StatusBubbleViews::CancelExpandTimer() {
   if (expand_timer_factory_.HasWeakPtrs())
     expand_timer_factory_.InvalidateWeakPtrs();
 }