Repurpose views+content example into a generic multiprocess views runtime

ui/app_list/views/app_list_demo.cc

+// Copyright 2014 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 "base/bind.h"
+#include "base/command_line.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/content_switches.h"
+#include "grit/ui_resources.h"
+#include "ui/app_list/pagination_model.h"
+#include "ui/app_list/test/app_list_test_model.h"
+#include "ui/app_list/test/app_list_test_view_delegate.h"
+#include "ui/app_list/views/app_list_view.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/views/examples/content_client/examples_main.h"
+
+namespace {
+
+class AppListDemoService;
+
+// Number of dummy apps to populate in the app list.
+const int kInitialItems = 20;
+
+// Extends the test AppListViewDelegate to quit the run loop when the launcher
+// window is closed, and to close the window if it is simply dismissed.
+class DemoAppListViewDelegate : public app_list::test::AppListTestViewDelegate {
+ public:
+  explicit DemoAppListViewDelegate(content::BrowserContext* browser_context)
+      : view_(NULL), browser_context_(browser_context) {}
+  virtual ~DemoAppListViewDelegate() {}
+
+  app_list::AppListView* InitView(gfx::NativeView window_context);
+
+  // Overridden from AppListViewDelegate:
+  virtual void Dismiss() OVERRIDE;
+  virtual void ViewClosing() OVERRIDE;
+  virtual content::WebContents* GetStartPageContents();
+
+ private:
+  app_list::PaginationModel pagination_model_;
+  app_list::AppListView* view_;  // Weak. Owns this.
+  content::BrowserContext* browser_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(DemoAppListViewDelegate);
+};
+
+app_list::AppListView* DemoAppListViewDelegate::InitView(
+    gfx::NativeView window_context) {
+  view_ = new app_list::AppListView(this);
+  view_->InitAsBubbleAtFixedLocation(window_context,
+                                     &pagination_model_,
+                                     gfx::Point(300, 300),
+                                     views::BubbleBorder::FLOAT,
+                                     false /* border_accepts_events */);
+
+  // Populate some apps.
+  GetTestModel()->PopulateApps(kInitialItems);
+  app_list::AppListItemList* item_list = GetTestModel()->top_level_item_list();
+  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+  gfx::Image test_image = rb.GetImageNamed(IDR_DEFAULT_FAVICON_32);
+  for (size_t i = 0; i < item_list->item_count(); ++i) {
+    app_list::AppListItem* item = item_list->item_at(i);
+    item->SetIcon(*test_image.ToImageSkia(), i & 1);
+  }
+  return view_;
+}
+
+void DemoAppListViewDelegate::Dismiss() {
+  view_->GetWidget()->Close();
+}
+
+void DemoAppListViewDelegate::ViewClosing() {
+  view_ = NULL;
+  base::MessageLoopForUI::current()->Quit();
+}
+
+content::WebContents* DemoAppListViewDelegate::GetStartPageContents() {
+  // TODO(tapted): Implement this properly. For now, we need a dependency on
+  // content to force a particular link order in shared library builds. Without
+  // this, sandbox::InitLibcUrandomOverrides() will fail because it can't find
+  // the symbol for fopen, when the linker places libc before libcontent in the
+  // link order.
+  return content::WebContents::Create(
+      content::WebContents::CreateParams(browser_context_));
+}
+
+void ShowAppList(content::BrowserContext* browser_context,
+                 gfx::NativeView window_context) {
+  DemoAppListViewDelegate* delegate =
+      new DemoAppListViewDelegate(browser_context);
+  app_list::AppListView* view = delegate->InitView(window_context);
+  view->GetWidget()->Show();
+  view->GetWidget()->Activate();
+}
+
+}  // namespace
+
+#if defined(OS_WIN)
+int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
+  views::examples::ExamplesMainParams params(instance);
+#else
+int main(int argc, const char** argv) {
+  views::examples::ExamplesMainParams params(argc, argv);
+#endif
+
+  params.set_task(base::Bind(&ShowAppList));
+  return params.RunMain();
+}