Implement Harmony-style consistent button widths for Collected Cookies.

chrome/browser/ui/views/harmony/layout_delegate.cc

 // Copyright 2016 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/harmony/layout_delegate.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "chrome/browser/ui/views/harmony/harmony_layout_delegate.h"
 #include "ui/base/material_design/material_design_controller.h"
@@ skipping 34 matching lines @@
     case Metric::SUBSECTION_HORIZONTAL_INDENT:
       return views::kCheckboxIndent;
     case Metric::UNRELATED_CONTROL_HORIZONTAL_SPACING:
       return views::kUnrelatedControlHorizontalSpacing;
     case Metric::UNRELATED_CONTROL_HORIZONTAL_SPACING_LARGE:
       return views::kUnrelatedControlLargeHorizontalSpacing;
     case Metric::UNRELATED_CONTROL_VERTICAL_SPACING:
       return views::kUnrelatedControlVerticalSpacing;
     case Metric::UNRELATED_CONTROL_VERTICAL_SPACING_LARGE:
       return views::kUnrelatedControlLargeVerticalSpacing;
+    case Metric::BUTTON_MAX_SHARED_WIDTH:
+      return 0;  // Buttons never expand during layout (add padding instead).
   }
   NOTREACHED();
   return 0;
 }
 
 views::GridLayout::Alignment LayoutDelegate::GetControlLabelGridAlignment()
     const {
   return views::GridLayout::TRAILING;
 }
 
 bool LayoutDelegate::UseExtraDialogPadding() const {
   return true;
 }
 
 bool LayoutDelegate::IsHarmonyMode() const {
   return false;
 }
 
 int LayoutDelegate::GetDialogPreferredWidth(DialogWidth width) const {
   return 0;
 }