Save/restore position for the preferences window based on prefs,

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index aa47bc493c0225b5d8478d300c7ad394e8283361..5500fa6092f63969412f826ad1e25dbdfe1ef516 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -644,6 +644,10 @@ const wchar_t kPageInfoWindowPlacement[] = L"page_info.window_placement";
 const wchar_t kKeywordEditorWindowPlacement[] =
     L"keyword_editor.window_placement";
 
+// A collection of position, size, and other data relating to the preferences
+// window to restore on startup.
+const wchar_t kPreferencesWindowPlacement[] = L"preferences.window_placement";
+
 // An integer specifying the total number of bytes to be used by the
 // renderer's in-memory cache of objects.
 const wchar_t kMemoryCacheSize[] = L"renderer.memory_cache.size";