Modernize on-demand update checks on Windows.

base/test/scoped_path_override.h

Index: base/test/scoped_path_override.h
diff --git a/base/test/scoped_path_override.h b/base/test/scoped_path_override.h
index a1e18e33899a9a1c7a0fb3f205988aaa3437de25..c6cffe2660f84ccfe0ec6240c6cdd7d181da2e23 100644
--- a/base/test/scoped_path_override.h
+++ b/base/test/scoped_path_override.h
@@ -20,8 +20,15 @@ class ScopedPathOverride {
  public:
   // Contructor that initializes the override to a scoped temp directory.
   explicit ScopedPathOverride(int key);
+
   // Constructor that would use a path provided by the user.
   ScopedPathOverride(int key, const FilePath& dir);
+
+  // See PathService::OverrideAndCreateIfNeeded.
+  ScopedPathOverride(int key,
+                     const FilePath& path,
+                     bool is_absolute,
+                     bool create);
   ~ScopedPathOverride();
 
  private: