Introduce RemoveChromeTaskbarShortcuts() to delete all pinned-to-taskbar shortcuts owned by the uni…

chrome/installer/util/shell_util.cc

 // Copyright (c) 2012 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.
 //
 // This file defines functions that integrate Chrome in Windows shell. These
 // functions can be used by Chrome as well as Chrome installer. All of the
 // work is done by the local functions defined in anonymous namespace in
 // this class.
 
 #include "chrome/installer/util/shell_util.h"
@@ skipping 1829 matching lines @@
       return file_util::Delete(shortcut_folder, true);
     else
       return file_util::Delete(shortcut_path, false);
   }
 
   // The shortcut at |shortcut_path| doesn't point to |chrome_exe|, act as if
   // our shortcut had been deleted.
   return true;
 }
 
+void ShellUtil::RemoveChromeTaskbarShortcuts(const string16& chrome_exe) {
+  FilePath taskbar_pins_path;
+  if (!PathService::Get(base::DIR_TASKBAR_PINS, &taskbar_pins_path) ||
+      !file_util::PathExists(taskbar_pins_path)) {
+    LOG(ERROR) << "Couldn't find path to taskbar pins.";
+    return;
+  }
+
+  file_util::FileEnumerator shortcuts_enum(
+      taskbar_pins_path, false,
+      file_util::FileEnumerator::FILES, FILE_PATH_LITERAL("*.lnk"));
+
+  FilePath chrome_path(chrome_exe);
+  InstallUtil::ProgramCompare chrome_compare(chrome_path);
+  for (FilePath shortcut_path = shortcuts_enum.Next(); !shortcut_path.empty();
+       shortcut_path = shortcuts_enum.Next()) {
+    FilePath read_target;
+    if (!base::win::ResolveShortcut(shortcut_path, &read_target, NULL)) {
+      NOTREACHED();
+      continue;
+    }
+    if (chrome_compare.Evaluate(read_target.value())) {
+      // Unpin this shortcut if it points to |chrome_exe|.
+      base::win::TaskbarUnpinShortcutLink(shortcut_path.value().c_str());
+    }
+  }
+}
+
 void ShellUtil::RemoveChromeStartScreenShortcuts(BrowserDistribution* dist,
                                                  const string16& chrome_exe) {
   if (base::win::GetVersion() < base::win::VERSION_WIN8)
     return;
 
   FilePath app_shortcuts_path;
   if (!PathService::Get(base::DIR_APP_SHORTCUTS, &app_shortcuts_path)) {
     LOG(ERROR) << "Could not get application shortcuts location to delete"
                << " start screen shortcuts.";
     return;
@@ skipping 75 matching lines @@
     // are any left...).
     if (free_bits >= 8 && next_byte_index < size) {
       free_bits -= 8;
       bit_stream += bytes[next_byte_index++] << free_bits;
     }
   }
 
   DCHECK_EQ(ret.length(), encoded_length);
   return ret;
 }