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 "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.
+AppActivity::AppActivity(content::WebContents* web_contents)
+    : web_contents_(web_contents), web_view_(NULL) {
+  DCHECK(web_contents_);
+}
+
+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_) {
+    web_view_ = new views::WebView(web_contents_->GetBrowserContext());
+    web_view_->SetWebContents(web_contents_);
+    Observe(web_view_->GetWebContents());
+  }
+  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