Removed string_util since is unused

Author: ficristo

appshell/cefclient.cpp

@@ -15,7 +15,6 @@
 #include "include/cef_web_plugin.h"
 #include "client_handler.h"
 #include "appshell/common/client_switches.h"
-#include "string_util.h"
 #include "util.h"
 #include "config.h"
 

appshell/cefclient_mac.mm

@@ -15,7 +15,6 @@
 #include "include/cef_runnable.h"
 #include "client_handler.h"
 #include "resource_util.h"
-#include "string_util.h"
 #include "config.h"
 #include "appshell_extensions.h"
 #include "command_callbacks.h"

appshell/cefclient_win.cpp

@@ -17,7 +17,6 @@
 #include "client_handler.h"
 #include "config.h"
 #include "resource.h"
-#include "string_util.h"
 #include "appshell/common/client_switches.h"
 #include "native_menu_model.h"
 #include "appshell_node_process.h"

appshell/client_handler.cpp

@@ -11,7 +11,6 @@
 #include "include/wrapper/cef_stream_resource_handler.h"
 #include "cefclient.h"
 #include "resource_util.h"
-#include "string_util.h"
 #include "appshell/appshell_extensions.h"
 #include "appshell/command_callbacks.h"
 

appshell/string_util.cpp

@@ -161,8 +161,6 @@
       'appshell/native_menu_model.cpp',
       'appshell/native_menu_model.h',
       'appshell/resource_util.h',
-      'appshell/string_util.cpp',
-      'appshell/string_util.h',
       'appshell/util.h',
     ],
     'appshell_sources_win': [
@@ -271,8 +269,6 @@
       'appshell/process_helper_mac.cpp',
       'appshell/resource_util.h',
       'appshell/resource_util_mac.mm',
-      'appshell/string_util.cpp',
-      'appshell/string_util.h',
       'appshell/util.h',
     ],
     'appshell_bundle_resources_mac': [