Task Manager: Make double-clicking on an extension do something useful.

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

 // 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/extension_task.h"
 
 #include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/chrome_pages.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/web_contents.h"
+#include "extensions/browser/process_manager.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handlers/icons_handler.h"
 #include "extensions/common/view_type.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace task_management {
 
@@ skipping 31 matching lines @@
 void ExtensionTask::UpdateTitle() {
   // The title of the extension should not change as a result of title change
   // in its WebContents, so we ignore this.
 }
 
 void ExtensionTask::UpdateFavicon() {
   // We don't care about the favicon of the WebContents but rather of the
   // extension.
 }
 
+void ExtensionTask::Activate() {
+  // This task represents the extension view of (for example) a background page
+  // or browser action button, so there is no top-level window to bring to the
+  // front. Instead, when this task is double-clicked, we bring up the
+  // chrome://extensions page in a tab, and highlight the details for this
+  // extension.
+  //
+  // TODO(nick): For extensions::VIEW_TYPE_APP_WINDOW, and maybe others, there
+  // may actually be a window we could focus. Special case those here as needed.
+  const extensions::Extension* extension =
+      extensions::ProcessManager::Get(web_contents()->GetBrowserContext())
+          ->GetExtensionForWebContents(web_contents());
+
+  if (!extension)
+    return;
+
+  Browser* browser = chrome::FindTabbedBrowser(
+      Profile::FromBrowserContext(web_contents()->GetBrowserContext()), true);
+
+  // If an existing browser isn't found, don't create a new one.
+  if (!browser)
+    return;
+
+  chrome::ShowExtensions(browser, extension->id());
+}
+
 Task::Type ExtensionTask::GetType() const {
   return Task::EXTENSION;
 }
 
 void ExtensionTask::OnExtensionIconImageChanged(extensions::IconImage* image) {
   DCHECK_EQ(extension_icon_.get(), image);
 
   if (!image->image_skia().isNull())
     set_icon(image->image_skia());
 }
@@ skipping 30 matching lines @@
                                 extension_misc::EXTENSION_ICON_SMALL,
                                 icon(),
                                 this));
 
   // Triggers actual image loading with 1x resources.
   extension_icon_->image_skia().GetRepresentation(1.0f);
   set_icon(extension_icon_->image_skia());
 }
 
 }  // namespace task_management