Add "bool FilePath::ReferencesParent()" which adds a clean & simple way for...

base/file_path.cc

Index: base/file_path.cc
===================================================================
--- base/file_path.cc	(revision 23136)
+++ base/file_path.cc	(working copy)
@@ -452,3 +452,17 @@
     }
   }
 }
+
+bool FilePath::ReferencesParent() const {
+  std::vector<FilePath::StringType> components;
+  GetComponents(&components);
+
+  std::vector<FilePath::StringType>::const_iterator it = components.begin();
+  for (; it != components.end(); ++it) {
+    const FilePath::StringType& component = *it;
+    if (component == kParentDirectory)
+      return true;
+  }
+  return false;
+}
+