Various optimizations to reduce the number of temporary allocations.

chrome/browser/themes/theme_properties.cc

Index: chrome/browser/themes/theme_properties.cc
diff --git a/chrome/browser/themes/theme_properties.cc b/chrome/browser/themes/theme_properties.cc
index caafb1cd89a7ad3beb8bbda1cc73ddce38aa44f8..1da2ec8512d26819b71c802864cc8c19b89897e2 100644
--- a/chrome/browser/themes/theme_properties.cc
+++ b/chrome/browser/themes/theme_properties.cc
@@ -201,14 +201,6 @@ std::string ThemeProperties::TilingToString(int tiling) {
 }
 
 // static
-bool ThemeProperties::IsThemeableImage(int id) {
-  // TODO(pkotwicz): Cache results to improve lookup speed.
-  std::set<int> themeable_idrs;
-  BrowserThemePack::GetThemeableImageIDRs(&themeable_idrs);
-  return themeable_idrs.find(id) != themeable_idrs.end();
-}
-
-// static
 const std::set<int>& ThemeProperties::GetTintableToolbarButtons() {
   CR_DEFINE_STATIC_LOCAL(std::set<int>, button_set, ());
   if (button_set.empty()) {