Introduces AppActivity and handler of chrome.shell API.

athena/content/app_activity.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 "athena/content/app_activity.h"
+
+#include "apps/shell/browser/shell_app_window.h"
+#include "athena/activity/public/activity_manager.h"
+#include "content/public/browser/web_contents.h"
+#include "ui/views/controls/webview/webview.h"
+
+namespace athena {
+
+// AppActivity is similar to WebActivity but doesn't have accelerators.

[oshima, 2014/06/16 18:40:08]

Apps does not support accelerator because there was some technical issues, not
really by design. (jamescook tried it before but didn't work well) Just FYI.

[Jun Mukai, 2014/06/16 18:48:15]

Removed this comment, but do you mean eventually we should add the same
accelerator handlers to AppWindow?  Then I should put a TODO here.

[oshima, 2014/06/16 18:53:16]

yes please.

[Jun Mukai, 2014/06/16 18:59:33]

Done.

+AppActivity::AppActivity(apps::ShellAppWindow* app_window)
+    : app_window_(app_window), web_view_(NULL) {
+  DCHECK(app_window_);
+}
+
+AppActivity::~AppActivity() {
+}
+
+ActivityViewModel* AppActivity::GetActivityViewModel() {
+  return this;
+}
+
+void AppActivity::Init() {
+}
+
+SkColor AppActivity::GetRepresentativeColor() {
+  // TODO(sad): Compute the color from the favicon.
+  return SK_ColorGRAY;
+}
+
+base::string16 AppActivity::GetTitle() {
+  return web_view_->GetWebContents()->GetTitle();
+}
+
+views::View* AppActivity::GetContentsView() {
+  if (!web_view_) {
+    content::WebContents* web_contents =
+        app_window_->GetAssociatedWebContents();
+    web_view_ = new views::WebView(web_contents->GetBrowserContext());
+    web_view_->SetWebContents(web_contents);
+    Observe(web_contents);
+  }
+  return web_view_;
+}
+
+void AppActivity::TitleWasSet(content::NavigationEntry* entry,
+                              bool explicit_set) {
+  ActivityManager::Get()->UpdateActivity(this);
+}
+
+void AppActivity::DidUpdateFaviconURL(
+    const std::vector<content::FaviconURL>& candidates) {
+  ActivityManager::Get()->UpdateActivity(this);
+}
+
+}  // namespace athena