New Task Manager - Phase 1.3.2.B: Implement Tab Contents Task Providing (Prerender)

chrome/browser/task_management/providers/web_contents/prerender_task.cc

Index: chrome/browser/task_management/providers/web_contents/prerender_task.cc
diff --git a/chrome/browser/task_management/providers/web_contents/prerender_task.cc b/chrome/browser/task_management/providers/web_contents/prerender_task.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cf2a0eaa0148bb979beb2de894996a3b0ff89777
--- /dev/null
+++ b/chrome/browser/task_management/providers/web_contents/prerender_task.cc
@@ -0,0 +1,57 @@
+// Copyright 2015 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/task_management/providers/web_contents/prerender_task.h"
+
+#include "chrome/grit/generated_resources.h"
+#include "grit/theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace task_management {
+
+namespace {
+
+gfx::ImageSkia* prerender_icon = nullptr;

[ncarter (slow), 2015/06/19 19:50:51]

g_prerender_icon (since it's a global)

[afakhry, 2015/06/19 21:49:22]

Done.

+
+// Returns the prerender icon or |nullptr| if the |ResourceBundle| is not ready
+// yet.
+gfx::ImageSkia* GetPrerenderIcon() {
+  if (prerender_icon)
+    return prerender_icon;
+
+  if (!ResourceBundle::HasSharedInstance())
+    return nullptr;
+
+  return ResourceBundle::GetSharedInstance().GetImageSkiaNamed(IDR_PRERENDER);
+}
+
+base::string16 PrefixTitle(const base::string16& title) {
+  return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_PRERENDER_PREFIX, title);
+}
+
+}  // namespace
+
+PrerenderTask::PrerenderTask(content::WebContents* web_contents)
+    : RendererTask(
+        PrefixTitle(RendererTask::GetTitleFromWebContents(web_contents)),

[ncarter (slow), 2015/06/19 19:50:51]

The indentation looks weird here (I expect 4 spaces relative to the R at the
start of RendererTask -- did git cl format do this?

[afakhry, 2015/06/19 21:49:22]

No that would be me.

Done.

+        GetPrerenderIcon(),
+        web_contents) {
+}
+
+PrerenderTask::~PrerenderTask() {
+}
+
+void PrerenderTask::OnTitleChanged(content::NavigationEntry* entry) {
+  // As long as this task lives we keep prefixing its title with "Prerender:".
+  set_title(PrefixTitle(RendererTask::GetTitleFromWebContents(web_contents())));
+}
+
+void PrerenderTask::OnFaviconChanged() {
+  // As long as this task lives we keep using the prerender icon, so we ignore
+  // this event.
+}
+
+}  // namespace task_management