Installer: adding ResolveShortcutProperties(); updating shortcut icons during shortcut migration.

base/win/shortcut.h

Index: base/win/shortcut.h
diff --git a/base/win/shortcut.h b/base/win/shortcut.h
index 0f5fb0f686be84e521f8ee403a5a3b903053c353..cb0771274b0f8020e3cdcf55d136557f2ba0e50b 100644
--- a/base/win/shortcut.h
+++ b/base/win/shortcut.h
@@ -118,11 +118,22 @@ BASE_EXPORT bool CreateOrUpdateShortcutLink(
     ShortcutOperation operation);
 
 // Resolve Windows shortcut (.LNK file)
-// This methods tries to resolve a shortcut .LNK file. The path of the shortcut
-// to resolve is in |shortcut_path|. If |target_path| is not NULL, the target
-// will be resolved and placed in |target_path|. If |args| is not NULL, the
-// arguments will be retrieved and placed in |args|. The function returns true
-// if all requested fields are found successfully.
+// This methods tries to resolve selected properties of a shortcut .LNK file.
+// The path of the shortcut to resolve is in |shortcut_path|. |options| is a bit
+// field composed of ShortcutProperties::IndividualProperties, to specify which
+// properties to read. The resulting data are read into |p| (non-NULL). The
+// function returns true if all requested properties are successfully read.
+// Otherwise some reads have failed, and intermediate values written to
+// |properties| should be ignored.
+BASE_EXPORT bool ResolveShortcutProperties(const FilePath& shortcut_path,
+                                           uint32 options,
+                                           ShortcutProperties* p);
+
+// Resolve Windows shortcut (.LNK file).
+// This is a wrapper to ResolveShortcutProperties() to handle the commonly used
+// cases of resolving target and arguments. |target_path| and |args| are
+// optional output variables that are ignored if NULL.
+// The function returns true if all requested fields are found successfully.
 // Callers can safely use the same variable for both |shortcut_path| and
 // |target_path|.
 BASE_EXPORT bool ResolveShortcut(const FilePath& shortcut_path,