Fix TooltipAura initial sizing.

ui/views/corewm/tooltip_aura.cc

 // Copyright 2013 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/corewm/tooltip_aura.h"
 
 #include "base/strings/string_split.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/gfx/screen.h"
@@ skipping 172 matching lines @@
 void TooltipAura::SetText(aura::Window* window,
                           const base::string16& tooltip_text,
                           const gfx::Point& location) {
   tooltip_window_ = window;
   int max_width = 0;
   int line_count = 0;
   base::string16 trimmed_text(tooltip_text);
   TrimTooltipToFit(label_.font_list(), GetMaxWidth(location), &trimmed_text,
                    &max_width, &line_count);
   label_.SetText(trimmed_text);
-  label_.SizeToFit(max_width + label_.GetInsets().width());
 
   if (!widget_) {
     widget_ = CreateTooltipWidget(tooltip_window_);
     widget_->SetContentsView(&label_);
     widget_->AddObserver(this);
   }
 
+  label_.SizeToFit(max_width + label_.GetInsets().width());
   SetTooltipBounds(location, label_.size());
 
   ui::NativeTheme* native_theme = widget_->GetNativeTheme();
   label_.set_background(
       views::Background::CreateSolidBackground(
           native_theme->GetSystemColor(
               ui::NativeTheme::kColorId_TooltipBackground)));
 
   label_.SetAutoColorReadabilityEnabled(false);
   label_.SetEnabledColor(native_theme->GetSystemColor(
@@ skipping 18 matching lines @@
 }
 
 void TooltipAura::OnWidgetDestroying(views::Widget* widget) {
   DCHECK_EQ(widget_, widget);
   widget_ = NULL;
   tooltip_window_ = NULL;
 }
 
 }  // namespace corewm
 }  // namespace views