Revert of Extract RuntimeEventRouter from extensions Runtime API

extensions/browser/process_manager.cc

Index: extensions/browser/process_manager.cc
diff --git a/extensions/browser/process_manager.cc b/extensions/browser/process_manager.cc
index d2c921b976f6e608370988ff60ef4b61f7a4be46..2146969106028018a415d13792e5122da024664f 100644
--- a/extensions/browser/process_manager.cc
+++ b/extensions/browser/process_manager.cc
@@ -14,6 +14,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/extensions/api/runtime/runtime_api.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_agent_host.h"
@@ -28,7 +29,6 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "content/public/common/renderer_preferences.h"
-#include "extensions/browser/api/runtime/runtime_event_router.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
@@ -771,11 +771,8 @@
        ++extension) {
     CreateBackgroundHostForExtensionLoad(this, extension->get());
 
-#if defined(ENABLE_EXTENSIONS)
-    // Android cannot call API implementations.
     RuntimeEventRouter::DispatchOnStartupEvent(GetBrowserContext(),
                                                (*extension)->id());
-#endif
   }
   startup_background_hosts_created_ = true;