views: add layout delegates

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_ =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+HarmonyLayoutDelegate* HarmonyLayoutDelegate::Get() {
+  return harmony_layout_delegate_.Pointer();
+}
+
+int HarmonyLayoutDelegate::GetLayoutDistance(LayoutDistanceType type) const {
+  const int kLayoutUnit = 16;
+  switch (type) {
+    case LayoutDistanceType::PANEL_VERT_MARGIN:
+      return kLayoutUnit;
+    case LayoutDistanceType::RELATED_BUTTON_HORIZONTAL_SPACING:
+      return kLayoutUnit / 2;
+    case LayoutDistanceType::RELATED_CONTROL_HORIZONTAL_SPACING:
+      return kLayoutUnit;
+    case LayoutDistanceType::RELATED_CONTROL_VERTICAL_SPACING:
+      return kLayoutUnit / 2;
+    case LayoutDistanceType::UNRELATED_CONTROL_VERTICAL_SPACING:
+      return kLayoutUnit;
+    case LayoutDistanceType::UNRELATED_CONTROL_LARGE_VERTICAL_SPACING:
+      return kLayoutUnit;
+    case LayoutDistanceType::BUTTON_VEDGE_MARGIN_NEW:
+      return kLayoutUnit;
+    case LayoutDistanceType::BUTTON_HEDGE_MARGIN_NEW:
+      return kLayoutUnit;
+  }
+  NOTREACHED();
+  return 0;
+}
+
+bool HarmonyLayoutDelegate::UseExtraDialogPadding() const {
+  return false;
+}