aura: Long launcher tooltips should elide at end.

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 342 matching lines @@
   requested_disabled_color_ = ui::NativeTheme::instance()->GetSystemColor(
       ui::NativeTheme::kColorId_LabelDisabledColor);
   background_color_ = ui::NativeTheme::instance()->GetSystemColor(
       ui::NativeTheme::kColorId_LabelBackgroundColor);
   auto_color_readability_ = true;
   RecalculateColors();
   horiz_alignment_ = ALIGN_CENTER;
   is_multi_line_ = false;
   allow_character_break_ = false;
   elide_in_middle_ = false;
+  elide_at_end_ = false;
   is_email_ = false;
   collapse_when_hidden_ = false;
   directionality_mode_ = USE_UI_DIRECTIONALITY;
   paint_as_focused_ = false;
   has_focus_border_ = false;
   enabled_shadow_color_ = 0;
   disabled_shadow_color_ = 0;
   shadow_offset_.SetPoint(1, 1);
   has_shadow_ = false;
 
@@ skipping 108 matching lines @@
 void Label::CalculateDrawStringParams(string16* paint_text,
                                       gfx::Rect* text_bounds,
                                       int* flags) const {
   DCHECK(paint_text && text_bounds && flags);
 
   if (is_email_) {
     *paint_text = ui::ElideEmail(text_, font_, GetAvailableRect().width());
   } else if (elide_in_middle_) {
     *paint_text = ui::ElideText(text_, font_, GetAvailableRect().width(),
                                 ui::ELIDE_IN_MIDDLE);
+  } else if (elide_at_end_) {
+    *paint_text = ui::ElideText(text_, font_, GetAvailableRect().width(),
+                                ui::ELIDE_AT_END);
   } else {
     *paint_text = text_;
   }
 
   *text_bounds = GetTextBounds();
   *flags = ComputeDrawStringFlags();
 }
 
 }  // namespace views