Various optimizations to reduce the number of temporary allocations.

chrome/browser/themes/browser_theme_pack.cc

Index: chrome/browser/themes/browser_theme_pack.cc
diff --git a/chrome/browser/themes/browser_theme_pack.cc b/chrome/browser/themes/browser_theme_pack.cc
index fe2f645cb496e972096827d983f38a0818de9092..4aceb069dab59875ca1be6c6e1e39c1a06aafe96 100644
--- a/chrome/browser/themes/browser_theme_pack.cc
+++ b/chrome/browser/themes/browser_theme_pack.cc
@@ -793,6 +793,21 @@ void BrowserThemePack::GetThemeableImageIDRs(std::set<int>* result) {
 #endif
 }
 
+// static
+bool BrowserThemePack::FindThemeableImageIDRs(int id) {
+  for (size_t i = 0; i < kPersistingImagesLength; ++i)
+    if (kPersistingImages[i].idr_id == id)
+      return true;
+
+#if defined(USE_ASH) && !defined(OS_CHROMEOS)
+  for (size_t i = 0; i < kPersistingImagesDesktopAuraLength; ++i)
+    if (kPersistingImagesDesktopAura[i].idr_id == id)
+      return true;
+#endif
+
+  return false;
+}
+
 bool BrowserThemePack::WriteToDisk(const base::FilePath& path) const {
   // Add resources for each of the property arrays.
   RawDataForWriting resources;