base: Remove using declaration of FundamentalValue as it's no longer necessary.

chrome/browser/ui/webui/options/personal_options_handler.cc

Index: chrome/browser/ui/webui/options/personal_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/personal_options_handler.cc b/chrome/browser/ui/webui/options/personal_options_handler.cc
index 9f97b65b98715cd5a48aae2c15308eba357a3738..8e6493fd50368a7741208be0e9d990d3e6e36fb1 100644
--- a/chrome/browser/ui/webui/options/personal_options_handler.cc
+++ b/chrome/browser/ui/webui/options/personal_options_handler.cc
@@ -338,7 +338,7 @@ void PersonalOptionsHandler::ObserveThemeChanged() {
 #if defined(TOOLKIT_GTK)
   GtkThemeService* theme_service = GtkThemeService::GetFrom(profile);
   bool is_gtk_theme = theme_service->UsingNativeTheme();
-  FundamentalValue gtk_enabled(!is_gtk_theme);
+  base::FundamentalValue gtk_enabled(!is_gtk_theme);
   web_ui_->CallJavascriptFunction(
       "options.PersonalOptions.setGtkThemeButtonEnabled", gtk_enabled);
 #else
@@ -347,7 +347,7 @@ void PersonalOptionsHandler::ObserveThemeChanged() {
 #endif
 
   bool is_classic_theme = !is_gtk_theme && theme_service->UsingDefaultTheme();
-  FundamentalValue enabled(!is_classic_theme);
+  base::FundamentalValue enabled(!is_classic_theme);
   web_ui_->CallJavascriptFunction(
       "options.PersonalOptions.setThemesResetButtonEnabled", enabled);
 }