Support "Pin to taskbar" for hosted app windows.

chrome/browser/web_applications/web_app_win.cc

Index: chrome/browser/web_applications/web_app_win.cc
diff --git a/chrome/browser/web_applications/web_app_win.cc b/chrome/browser/web_applications/web_app_win.cc
index 0c630f6ab0e3f91d34cdbb57aff9993a768cc4ef..529e863523851c3734e9ac46a5553003cbc6d07e 100644
--- a/chrome/browser/web_applications/web_app_win.cc
+++ b/chrome/browser/web_applications/web_app_win.cc
@@ -23,6 +23,7 @@
 #include "chrome/installer/util/shell_util.h"
 #include "chrome/installer/util/util_constants.h"
 #include "content/public/browser/browser_thread.h"
+#include "ui/base/win/shell.h"
 #include "ui/gfx/icon_util.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_family.h"
@@ -323,6 +324,58 @@ void GetShortcutLocationsAndDeleteShortcuts(
   }
 }
 
+void CreateIconAndSetRelaunchDetails(const base::FilePath& web_app_path,
+                                     const base::FilePath& icon_file,
+                                     const web_app::ShortcutInfo& shortcut_info,
+                                     HWND hwnd) {
+  DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+
+  CommandLine command_line =
+      ShellIntegration::CommandLineArgsForLauncher(shortcut_info.url,
+                                                   shortcut_info.extension_id,
+                                                   shortcut_info.profile_path);
+
+  base::FilePath chrome_exe;
+  if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
+    NOTREACHED();
+    return;
+  }
+  command_line.SetProgram(chrome_exe);
+  ui::win::SetRelaunchDetailsForWindow(
+      command_line.GetCommandLineString(), shortcut_info.title, hwnd);
+
+  if (!base::PathExists(web_app_path) && !base::CreateDirectory(web_app_path))
+    return;
+
+  ui::win::SetAppIconForWindow(icon_file.value(), hwnd);
+  web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon);
+}
+
+void OnShortcutInfoLoadedForSetRelaunchDetails(
+    HWND hwnd,
+    const web_app::ShortcutInfo& shortcut_info) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  // Set window's icon to the one we're about to create/update in the web app
+  // path. The icon cache will refresh on icon creation.
+  base::FilePath web_app_path =
+      web_app::GetWebAppDataDirectory(shortcut_info.profile_path,
+                                      shortcut_info.extension_id,
+                                      shortcut_info.url);
+  base::FilePath icon_file =
+      web_app_path.Append(web_app::internals::GetSanitizedFileName(
+                              shortcut_info.title))
+          .ReplaceExtension(FILE_PATH_LITERAL(".ico"));
+
+  content::BrowserThread::PostBlockingPoolTask(
+      FROM_HERE,
+      base::Bind(&CreateIconAndSetRelaunchDetails,
+                 web_app_path,
+                 icon_file,
+                 shortcut_info,
+                 hwnd));
+}
+
 }  // namespace
 
 namespace web_app {
@@ -351,6 +404,15 @@ base::FilePath CreateShortcutInWebAppDir(const base::FilePath& web_app_dir,
   return web_app_dir_shortcut;
 }
 
+void UpdateRelaunchDetailsForApp(Profile* profile,
+                                 const extensions::Extension* extension,
+                                 HWND hwnd) {
+  web_app::UpdateShortcutInfoAndIconForApp(
+      extension,
+      profile,
+      base::Bind(&OnShortcutInfoLoadedForSetRelaunchDetails, hwnd));
+}
+
 namespace internals {
 
 // Saves |image| to |icon_file| if the file is outdated and refresh shell's