Restored Pre-Harmony Bubble title margin metrics

chrome/browser/ui/views/harmony/harmony_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/harmony_layout_provider.h"
 
 gfx::Insets HarmonyLayoutProvider::GetInsetsMetric(int metric) const {
   DCHECK_LT(metric, views::VIEWS_INSETS_MAX);
   switch (metric) {
     case views::INSETS_DIALOG_BUTTON:
     case views::INSETS_PANEL:
     case views::INSETS_BUBBLE_CONTENTS:
       return gfx::Insets(kHarmonyLayoutUnit);
+    case views::INSETS_BUBBLE_TITLE:
     case views::INSETS_DIALOG_TITLE: {
       constexpr int top = kHarmonyLayoutUnit;
       constexpr int side = kHarmonyLayoutUnit;
       // Titles are inset at the top and sides, but not at the bottom.
       return gfx::Insets(top, side, 0, side);
     }
     case views::INSETS_VECTOR_IMAGE_BUTTON:
       return gfx::Insets(kHarmonyLayoutUnit / 4);
   }
   NOTREACHED();
@@ skipping 80 matching lines @@
       return 512;
   }
   NOTREACHED();
   return 0;
 }
 
 const views::TypographyProvider& HarmonyLayoutProvider::GetTypographyProvider()
     const {
   return typography_provider_;
 }