"Bootstrap" a toolkit-views Typography spec.

ui/views/style/typography.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/style/typography.h"
+
+#include "base/logging.h"
+#include "ui/views/style/typography_provider.h"
+#include "ui/views/views_delegate.h"
+
+namespace views {
+namespace typography {
+namespace {
+
+void ValidateContextAndStyle(int text_context, int text_style) {
+  DCHECK(ViewsDelegate::GetInstance());

[Peter Kasting, 2017/03/17 02:26:00]

Nit: I kinda don't think we should have this, or at least not here, but maybe it
was helping you track down bugs.

[tapted, 2017/03/17 10:33:11]

removed. I didn't originally have it - the test crashes were a bit obtuse, but
it was simple enough to debug without this I guess. (I put this in to sweep for
more, but nothing turned up).

+  DCHECK(text_context > VIEWS_TEXT_CONTEXT_START &&

[Peter Kasting, 2017/03/17 02:26:00]

Nit: Split to two DCHECKs, then change all three DCHECKs to use _LT, _GE, etc.

[tapted, 2017/03/17 10:33:11]

Done.

+         text_context < TEXT_CONTEXT_MAX);
+  DCHECK(text_style > VIEWS_TEXT_STYLE_START);
+}
+
+}  // namespace
+
+const gfx::FontList& GetFont(int text_context, int text_style) {
+  ValidateContextAndStyle(text_context, text_style);
+  return ViewsDelegate::GetInstance()->GetTypographyProvider().GetFont(
+      text_context, text_style);
+}
+
+SkColor GetColor(int text_context, int text_style) {
+  ValidateContextAndStyle(text_context, text_style);
+  return ViewsDelegate::GetInstance()->GetTypographyProvider().GetColor(
+      text_context, text_style);
+}
+
+int GetLineHeight(int text_context, int text_style) {
+  ValidateContextAndStyle(text_context, text_style);
+  return ViewsDelegate::GetInstance()->GetTypographyProvider().GetLineHeight(
+      text_context, text_style);
+}
+
+}  // namespace typography
+}  // namespace views