Fix Harmony popover buttons being flush with their content.

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

 // Copyright 2017 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/chrome_layout_provider.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/ui/views/harmony/chrome_typography.h"
 #include "chrome/browser/ui/views/harmony/harmony_layout_provider.h"
@@ skipping 12 matching lines @@
              ? base::MakeUnique<HarmonyLayoutProvider>()
              : base::MakeUnique<ChromeLayoutProvider>();
 }
 
 int ChromeLayoutProvider::GetDistanceMetric(int metric) const {
   switch (metric) {
     case DISTANCE_BUTTON_MINIMUM_WIDTH:
       return views::kMinimumButtonWidth;
     case DISTANCE_CONTROL_LIST_VERTICAL:
       return GetDistanceMetric(DISTANCE_UNRELATED_CONTROL_VERTICAL);
-    case DISTANCE_DIALOG_BUTTON_TOP:

[Bret, 2017/06/07 22:52:18]

This was unused.

-      return 0;
     case DISTANCE_RELATED_CONTROL_HORIZONTAL_SMALL:
       return views::kRelatedControlSmallHorizontalSpacing;
     case DISTANCE_RELATED_CONTROL_VERTICAL_SMALL:
       return views::kRelatedControlSmallVerticalSpacing;
     case DISTANCE_RELATED_LABEL_HORIZONTAL:
       return views::kItemLabelSpacing;
     case DISTANCE_SUBSECTION_HORIZONTAL_INDENT:
       return views::kCheckboxIndent;
     case DISTANCE_UNRELATED_CONTROL_HORIZONTAL:
       return views::kUnrelatedControlHorizontalSpacing;
@@ skipping 25 matching lines @@
   return true;
 }
 
 bool ChromeLayoutProvider::ShouldShowWindowIcon() const {
   return true;
 }
 
 bool ChromeLayoutProvider::IsHarmonyMode() const {
   return false;
 }