Various optimizations to reduce the number of temporary allocations.

chrome/browser/themes/theme_service.cc

Index: chrome/browser/themes/theme_service.cc
diff --git a/chrome/browser/themes/theme_service.cc b/chrome/browser/themes/theme_service.cc
index 053cfb89c26a91125ec60624a12776b5f9e38d57..8c5c9b698c5d11f92929e14b6a117370274ee102 100644
--- a/chrome/browser/themes/theme_service.cc
+++ b/chrome/browser/themes/theme_service.cc
@@ -236,13 +236,8 @@ bool ThemeService::ShouldUseNativeFrame() const {
 }
 
 bool ThemeService::HasCustomImage(int id) const {
-  if (!Properties::IsThemeableImage(id))
-    return false;
-
-  if (theme_supplier_.get())
-    return theme_supplier_->HasCustomImage(id);
-
-  return false;
+  return BrowserThemePack::IsPersistentImageID(id) &&
+      theme_supplier_ && theme_supplier_->HasCustomImage(id);
 }
 
 base::RefCountedMemory* ThemeService::GetRawData(