Implement Harmony-style consistent button widths for Collected Cookies.

chrome/browser/ui/views/harmony/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/harmony_layout_delegate.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 
 static base::LazyInstance<HarmonyLayoutDelegate> harmony_layout_delegate_ =
@@ skipping 33 matching lines @@
     case Metric::SUBSECTION_HORIZONTAL_INDENT:
       return 0;
     case Metric::UNRELATED_CONTROL_HORIZONTAL_SPACING:
       return kHarmonyLayoutUnit;
     case Metric::UNRELATED_CONTROL_HORIZONTAL_SPACING_LARGE:
       return kHarmonyLayoutUnit;
     case Metric::UNRELATED_CONTROL_VERTICAL_SPACING:
       return kHarmonyLayoutUnit;
     case Metric::UNRELATED_CONTROL_VERTICAL_SPACING_LARGE:
       return kHarmonyLayoutUnit;
+    case Metric::BUTTON_MAX_SHARED_WIDTH:
+      return kHarmonyLayoutUnit * 8;
   }
   NOTREACHED();
   return 0;
 }
 
 views::GridLayout::Alignment
 HarmonyLayoutDelegate::GetControlLabelGridAlignment() const {
   return views::GridLayout::LEADING;
 }
 
@@ skipping 10 matching lines @@
     case DialogWidth::SMALL:
       return 320;
     case DialogWidth::MEDIUM:
       return 448;
     case DialogWidth::LARGE:
       return 512;
   }
   NOTREACHED();
   return 0;
 }