[WebPayments] Start populating the Payment Sheet.

chrome/browser/ui/views/payments/payment_request_views_util.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/payments/payment_request_views_util.h"
 
 #include "base/memory/ptr_util.h"
+#include "chrome/browser/ui/views/payments/payment_request_sheet_controller.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/vector_icons/vector_icons.h"
 #include "ui/views/background.h"
+#include "ui/views/bubble/bubble_frame_view.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/button/vector_icon_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/view.h"
 
+namespace {

[please use gerrit instead, 2017/01/04 15:55:27]

Here and elsewhere:

nit: Anonymous namespace usually goes inside of the named namespace.

[anthonyvd, 2017/01/04 19:08:55]

Wow I've been doing the opposite for 2 years. It looks like different parts of
the code do different things (view.cc has it nested but code in c/b/profiles has
it outside for example). Changed it here and will stick to your suggested style
in Payments code.

[please use gerrit instead, 2017/01/04 19:17:11]

Thank you. As long as we're consistent, I'm OK with what you prefer.

+
+constexpr int kTopInsetSize = 9;
+constexpr int kBottomInsetSize = 18;
+constexpr int kSideInsetSize = 14;

[please use gerrit instead, 2017/01/04 15:55:27]

Here and elsewhere:

It's easier to read the code if the single-use constants are defined immediately
before they are used, inside of the function.

[anthonyvd, 2017/01/04 19:08:55]

Done.

+
+}  // namespace
+
 namespace payments {
 
+std::unique_ptr<views::View> CreateSheetHeaderView(
+    bool show_back_arrow,
+    const base::string16& title,
+    views::VectorIconButtonDelegate* delegate) {
+  std::unique_ptr<views::View> container = base::MakeUnique<views::View>();
+  views::GridLayout* layout = new views::GridLayout(container.get());
+  container->SetLayoutManager(layout);
+
+  views::ColumnSet* columns = layout->AddColumnSet(0);
+  // A column for the optional back arrow.
+  columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::CENTER,
+                     0, views::GridLayout::USE_PREF, 0, 0);
+  // A column for the title.
+  columns->AddColumn(views::GridLayout::FILL, views::GridLayout::CENTER,
+                     1, views::GridLayout::USE_PREF, 0, 0);
+  // A column for the close button.
+  columns->AddColumn(views::GridLayout::TRAILING, views::GridLayout::CENTER,
+                     0, views::GridLayout::USE_PREF, 0, 0);
+
+  layout->StartRow(0, 0);
+  if (!show_back_arrow) {
+    layout->SkipColumns(1);
+  } else {
+    views::VectorIconButton* back_arrow = new views::VectorIconButton(delegate);
+    back_arrow->SetIcon(gfx::VectorIconId::NAVIGATE_BACK);
+    back_arrow->SetSize(back_arrow->GetPreferredSize());
+    back_arrow->set_tag(BACK_BUTTON_TAG);
+    layout->AddView(back_arrow);
+  }
+
+  views::Label* title_label = new views::Label(title);
+  title_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+  layout->AddView(title_label);
+  views::Button* close_button =
+      views::BubbleFrameView::CreateCloseButton(delegate);
+  close_button->set_tag(CLOSE_BUTTON_TAG);
+  layout->AddView(close_button);
+
+  return container;
+}
+
+
 std::unique_ptr<views::View> CreatePaymentView(
-    const base::string16& title, std::unique_ptr<views::View> content_view) {
+    std::unique_ptr<views::View> header_view,
+    std::unique_ptr<views::View> content_view) {
   std::unique_ptr<views::View> view = base::MakeUnique<views::View>();
   view->set_background(views::Background::CreateSolidBackground(SK_ColorWHITE));
 
   // Paint the sheets to layers, otherwise the MD buttons (which do paint to a
   // layer) won't do proper clipping.
   view->SetPaintToLayer(true);
 
   views::GridLayout* layout = new views::GridLayout(view.get());
   view->SetLayoutManager(layout);
+  layout->SetInsets(
+      kTopInsetSize, kSideInsetSize, kBottomInsetSize, kSideInsetSize);
   views::ColumnSet* columns = layout->AddColumnSet(0);
   columns->AddColumn(views::GridLayout::FILL, views::GridLayout::CENTER,
                      1, views::GridLayout::USE_PREF, 0, 0);
 
   layout->StartRow(0, 0);
-  layout->AddView(new views::Label(title));
+  // |header_view| will be deleted when |view| is.
+  layout->AddView(header_view.release());
 
   layout->StartRow(0, 0);
   // |content_view| will be deleted when |view| is.
   layout->AddView(content_view.release());
 
   return view;
 }
 
 }  // namespace payments