Do not invoke DrawFadedString() if it knows it does not fade.

ui/views/controls/label.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 "ui/views/controls/label.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <vector>
@@ skipping 329 matching lines @@
   }
 
   return false;
 }
 
 void Label::PaintText(gfx::Canvas* canvas,
                       const base::string16& text,
                       const gfx::Rect& text_bounds,
                       int flags) {
   SkColor color = enabled() ? actual_enabled_color_ : actual_disabled_color_;
-  if (elide_behavior_ == gfx::FADE_TAIL) {
+  if (elide_behavior_ == gfx::FADE_TAIL &&
+      text_bounds.width() < GetTextSize().width()) {
     canvas->DrawFadedString(text, font_list_, color, text_bounds, flags);
   } else {
     canvas->DrawStringRectWithShadows(text, font_list_, color, text_bounds,
                                       line_height_, flags, shadows_);
   }
 
   if (HasFocus()) {
     gfx::Rect focus_bounds = text_bounds;
     focus_bounds.Inset(-kFocusBorderPadding, -kFocusBorderPadding);
     canvas->DrawFocusRect(focus_bounds);
@@ skipping 241 matching lines @@
 }
 
 bool Label::ShouldShowDefaultTooltip() const {
   const gfx::Size text_size = GetTextSize();
   const gfx::Size size = GetContentsBounds().size();
   return !obscured() && (text_size.width() > size.width() ||
                          (multi_line_ && text_size.height() > size.height()));
 }
 
 }  // namespace views