Improve some naming

chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm

Index: chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
diff --git a/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm b/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
index 5c568a27cadf621480e6bc448fe57ca53ff8095e..93810f3afe2b1c0b23f10836a811a60c807f3217 100644
--- a/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
+++ b/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
@@ -120,7 +120,7 @@ NSImage* GetImageFromResourceID(int resourceId) {
   if ((self = [super initWithBrowser:browser])) {
     ThemeService* themeService =
         ThemeServiceFactory::GetForProfile(browser->profile());
-    isThemedWindow_ = !themeService->UsingNativeTheme();
+    isThemedWindow_ = !themeService->UsingSystemTheme();
 
     HoverImageButton* hoverButton =
         [[HoverImageButton alloc] initWithFrame:NSZeroRect];
@@ -169,7 +169,7 @@ NSImage* GetImageFromResourceID(int resourceId) {
   // Redraw the button if the window has switched between themed and native.
   ThemeService* themeService =
       ThemeServiceFactory::GetForProfile(browser_->profile());
-  BOOL updatedIsThemedWindow = !themeService->UsingNativeTheme();
+  BOOL updatedIsThemedWindow = !themeService->UsingSystemTheme();
   if (isThemedWindow_ != updatedIsThemedWindow) {
     isThemedWindow_ = updatedIsThemedWindow;
     [[button_ cell] setIsThemedWindow:isThemedWindow_];