Reduce amount of boilerplate associated with bootstrap libraries.

runtime/vm/bootstrap.h

Index: runtime/vm/bootstrap.h
diff --git a/runtime/vm/bootstrap.h b/runtime/vm/bootstrap.h
index 7c5ab0ea6a5cb6cc2b8ec2fd178b093889f64d10..0c2d9124adbdac930e158c52933f77a041bdf492 100644
--- a/runtime/vm/bootstrap.h
+++ b/runtime/vm/bootstrap.h
@@ -15,7 +15,7 @@ class RawError;
 
 class Bootstrap : public AllStatic {
  public:
-  static RawError* LoadandCompileScripts();
+  static RawError* DoBootstrapping();
   static void SetupNativeResolver();
   static bool IsBootstapResolver(Dart_NativeEntryResolver resolver);
 
@@ -45,9 +45,11 @@ class Bootstrap : public AllStatic {
   static const char* isolate_patch_paths_[];
   static const char* math_patch_paths_[];
   static const char* mirrors_patch_paths_[];
-  static const char* profiler_patch_paths_[];
-  static const char* typed_data_patch_paths_[];
   static const char* _vmservice_patch_paths_[];
+
+  // NULL patch paths for libraries that do not have patch files.
+  static const char** profiler_patch_paths_;
+  static const char** typed_data_patch_paths_;
 };
 
 }  // namespace dart