Fix extension installed bubble sizing for cases where there's no body text.

chrome/browser/ui/views/extensions/extension_installed_bubble_view.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 <algorithm>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/user_metrics_action.h"
@@ skipping 212 matching lines @@
   // Info is shown for browser actions, page actions and Omnibox keyword
   // extensions and might list keyboard shorcut for the former two types.
   // Extra info is...
   // ... for other types, either a description of how to manage the extension
   //     or a link to configure the keybinding shortcut (if one exists).
   // Extra info can include a promo for signing into sync.
 
   std::unique_ptr<views::BoxLayout> layout(
       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0,
                            views::kRelatedControlVerticalSpacing));
+  layout->set_minimum_cross_axis_size(kRightColumnWidth);
   // Indent by the size of the icon.
   layout->set_inside_border_insets(gfx::Insets(
       0, GetIconSize().width() + views::kUnrelatedControlHorizontalSpacing, 0,
       0));
   layout->set_cross_axis_alignment(
       views::BoxLayout::CROSS_AXIS_ALIGNMENT_START);
   SetLayoutManager(layout.release());
 
   if (controller_->options() & ExtensionInstalledBubble::HOW_TO_USE)
     AddChildView(CreateLabel(controller_->GetHowToUseDescription()));
@@ skipping 109 matching lines @@
             ->browser_actions();
     return !container->animating();
   }
   return true;
 }
 
 // Implemented here to create the platform specific instance of the BubbleUi.
 std::unique_ptr<BubbleUi> ExtensionInstalledBubble::BuildBubbleUi() {
   return base::WrapUnique(new ExtensionInstalledBubbleUi(this));
 }