VR: Use ToolbarModel to drive VR URL bar state.

chrome/browser/android/vr_shell/toolbar_helper.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/android/vr_shell/toolbar_helper.h"
+
+#include "base/memory/ptr_util.h"
+#include "components/toolbar/toolbar_model_impl.h"
+
+class ToolbarModelDelegate;
+
+namespace vr_shell {
+
+namespace {
+
+// This number is arbitrary. For VR, use a number smaller than desktop's 32K, as
+// the URL indicator does not show long URLs.
+constexpr int kMaxURLDisplayChars = 1024;
+
+}  // namespace
+
+ToolbarHelper::ToolbarHelper(UiInterface* ui, ToolbarModelDelegate* delegate)
+    : ui_(ui),
+      toolbar_model_(
+          base::MakeUnique<ToolbarModelImpl>(delegate, kMaxURLDisplayChars)) {}
+
+ToolbarHelper::~ToolbarHelper() {}
+
+void ToolbarHelper::Update() {
+  ToolbarState state(
+      toolbar_model_->GetURL(), toolbar_model_->GetSecurityLevel(true),
+      &toolbar_model_->GetVectorIcon(), toolbar_model_->GetSecureVerboseText(),
+      toolbar_model_->ShouldDisplayURL());
+
+  if (current_state_ == state)
+    return;
+  current_state_ = state;
+  ui_->SetToolbarState(state);
+}
+
+}  // namespace vr_shell