Harmony: Apply the upper bound on equal-sized button widths in DialogClientView.

ui/views/test/test_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 "ui/views/test/test_layout_provider.h"
+
+namespace views {
+namespace test {
+
+TestLayoutProvider::TestLayoutProvider() {}
+TestLayoutProvider::~TestLayoutProvider() {}
+
+void TestLayoutProvider::SetDistanceMetric(int metric, int value) {
+  distance_metrics_[metric] = value;
+}
+void TestLayoutProvider::SetSnappedDialogWidth(int width) {
+  snapped_dialog_width_ = width;
+}
+
+int TestLayoutProvider::GetDistanceMetric(int metric) const {
+  if (distance_metrics_.count(metric))
+    return distance_metrics_.find(metric)->second;
+  return LayoutProvider::GetDistanceMetric(metric);
+}
+
+int TestLayoutProvider::GetSnappedDialogWidth(int min_width) const {
+  return snapped_dialog_width_ ? snapped_dialog_width_ : min_width;
+}
+
+}  // namespace test
+}  // namespace views