Revert change to Platform.excutable and add Platform.resolvedExecutable

runtime/bin/platform.cc

Index: runtime/bin/platform.cc
diff --git a/runtime/bin/platform.cc b/runtime/bin/platform.cc
index 2f55f9d695ce353def762f43748bb1017c5cdbfa..0ed2bd364fd10eec6d347472f6233379e94a3cc1 100644
--- a/runtime/bin/platform.cc
+++ b/runtime/bin/platform.cc
@@ -13,7 +13,7 @@ namespace dart {
 namespace bin {
 
 const char* Platform::executable_name_ = NULL;
-bool Platform::executable_name_resolved_ = false;
+const char* Platform::resolved_executable_name_ = NULL;
 const char* Platform::package_root_ = NULL;
 int Platform::script_index_ = 1;
 char** Platform::argv_ = NULL;
@@ -51,6 +51,16 @@ void FUNCTION_NAME(Platform_ExecutableName)(Dart_NativeArguments args) {
 }
 
 
+void FUNCTION_NAME(Platform_ResolvedExecutableName)(Dart_NativeArguments args) {
+  if (Platform::GetResolvedExecutableName() != NULL) {
+    Dart_SetReturnValue(
+        args, Dart_NewStringFromCString(Platform::GetResolvedExecutableName()));
+  } else {
+    Dart_SetReturnValue(args, Dart_Null());
+  }
+}
+
+
 void FUNCTION_NAME(Platform_ExecutableArguments)(Dart_NativeArguments args) {
   int end = Platform::GetScriptIndex();
   char** argv = Platform::GetArgv();