Add a debug view to the browser that allows various navigation features to be used.

mash/browser/debug_view.cc

Index: mash/browser/debug_view.cc
diff --git a/mash/browser/debug_view.cc b/mash/browser/debug_view.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ffddf3d77b0bae38e8017ce98c93d584605de634
--- /dev/null
+++ b/mash/browser/debug_view.cc
@@ -0,0 +1,68 @@
+// 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 "mash/browser/debug_view.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/background.h"
+#include "ui/views/controls/button/label_button.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/controls/textfield/textfield.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/fill_layout.h"
+
+namespace mash {
+namespace browser {
+
+DebugView::DebugView()
+    : interstitial_container_(new views::View),
+      interstitial_label_(
+          new views::Label(base::ASCIIToUTF16("Interstitial: "))),
+      interstitial_show_(
+          new views::LabelButton(this, base::ASCIIToUTF16("Show"))),
+      interstitial_hide_(
+          new views::LabelButton(this, base::ASCIIToUTF16("Hide"))),
+      interstitial_content_(new views::Textfield) {
+  AddChildView(interstitial_container_);
+  interstitial_container_->AddChildView(interstitial_label_);
+  interstitial_container_->AddChildView(interstitial_show_);
+  interstitial_container_->AddChildView(interstitial_hide_);
+  interstitial_container_->AddChildView(interstitial_content_);
+  views::BoxLayout* layout =
+      new views::BoxLayout(views::BoxLayout::kHorizontal, 5, 5, 5);
+  interstitial_container_->SetLayoutManager(layout);
+  layout->set_main_axis_alignment(views::BoxLayout::MAIN_AXIS_ALIGNMENT_START);
+  layout->set_cross_axis_alignment(
+      views::BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
+  layout->SetDefaultFlex(0);
+  layout->SetFlexForView(interstitial_content_, 1);
+
+  set_background(views::Background::CreateStandardPanelBackground());
+  SetLayoutManager(new views::FillLayout);
+}
+
+DebugView::~DebugView() {}
+
+gfx::Size DebugView::GetPreferredSize() const {
+  return interstitial_container_->GetPreferredSize();
+}
+
+void DebugView::OnPaint(gfx::Canvas* canvas) {
+  gfx::Rect stroke_rect = GetLocalBounds();
+  stroke_rect.set_height(1);
+  canvas->FillRect(stroke_rect, SK_ColorGRAY);
+}
+
+void DebugView::ButtonPressed(views::Button* sender, const ui::Event& event) {
+  DCHECK(view_);
+  if (sender == interstitial_show_) {
+    view_->ShowInterstitial(base::UTF16ToUTF8(interstitial_content_->text()));
+  } else if (sender == interstitial_hide_) {
+    view_->HideInterstitial();
+  }
+}
+
+}  // namespace browser
+}  // namespace mash