Add ChromeBrowserMainExtraParts for non main parts.

chrome/browser/chrome_browser_parts_gtk.cc

Index: chrome/browser/chrome_browser_parts_gtk.cc
diff --git a/chrome/browser/chrome_browser_parts_gtk.cc b/chrome/browser/chrome_browser_parts_gtk.cc
index 3d1a5aaeab8e2ed80dfd093259c9efedbc532a83..04469790aa7a33c8e1f6a9c4d30d77f91f11b957 100644
--- a/chrome/browser/chrome_browser_parts_gtk.cc
+++ b/chrome/browser/chrome_browser_parts_gtk.cc
@@ -15,34 +15,13 @@
 #include "ui/gfx/gtk_util.h"
 
 ChromeBrowserPartsGtk::ChromeBrowserPartsGtk()
-    : content::BrowserMainParts() {
+    : ChromeBrowserParts() {
 }
 
 void ChromeBrowserPartsGtk::PreEarlyInitialization() {
   DetectRunningAsRoot();
 }
 
-void ChromeBrowserPartsGtk::PostEarlyInitialization() {
-}
-
-void ChromeBrowserPartsGtk::ToolkitInitialized() {
-}
-
-void ChromeBrowserPartsGtk::PreMainMessageLoopStart() {
-}
-
-void ChromeBrowserPartsGtk::PostMainMessageLoopStart() {
-}
-
-void ChromeBrowserPartsGtk::PreMainMessageLoopRun() {
-}
-
-bool ChromeBrowserPartsGtk::MainMessageLoopRun(int* result_code) {
-  return false;
-}
-
-void ChromeBrowserPartsGtk::PostMainMessageLoopRun() {
-}
 
 void ChromeBrowserPartsGtk::DetectRunningAsRoot() {
   if (geteuid() == 0) {