Revert change to Platform.excutable and add Platform.resolvedExecutable

runtime/bin/platform.h

Index: runtime/bin/platform.h
diff --git a/runtime/bin/platform.h b/runtime/bin/platform.h
index 6b81539da10433bb69f943b98eb2756d019479ba..3d3c0f3135c842a1b793b5017a0c556c94d1d69d 100644
--- a/runtime/bin/platform.h
+++ b/runtime/bin/platform.h
@@ -46,15 +46,14 @@ class Platform {
     executable_name_ = executable_name;
   }
   static const char* GetExecutableName() {
-    if (!executable_name_resolved_) {
+    return executable_name_;
+  }
+  static const char* GetResolvedExecutableName() {
+    if (resolved_executable_name_ == NULL) {
       // Try to resolve the executable path using platform specific APIs.
-      char* path = Platform::ResolveExecutablePath();
-      if (path != NULL) {
-        executable_name_ = path;
-      }
-      executable_name_resolved_ = true;
+      resolved_executable_name_ = Platform::ResolveExecutablePath();
     }
-    return executable_name_;
+    return resolved_executable_name_;
   }
 
   // Stores and gets the package root.
@@ -80,8 +79,8 @@ class Platform {
  private:
   // The path to the executable.
   static const char* executable_name_;
-  // State to indicate whether the executable name has been resolved.
-  static bool executable_name_resolved_;
+  // The path to the resolved executable.
+  static const char* resolved_executable_name_;
 
   static const char* package_root_;
   static int script_index_;