Clean up the IconLoader.

chrome/browser/icon_loader_win.cc

Index: chrome/browser/icon_loader_win.cc
diff --git a/chrome/browser/icon_loader_win.cc b/chrome/browser/icon_loader_win.cc
index 759088d34b9d6fabeaaae8b66ec221861883065d..0ce1c2190f2e3f61e63558eb36512a4247729510 100644
--- a/chrome/browser/icon_loader_win.cc
+++ b/chrome/browser/icon_loader_win.cc
@@ -17,18 +17,15 @@
 #include "ui/gfx/image/image_skia.h"
 
 // static
-IconGroupID IconLoader::ReadGroupIDFromFilepath(
-    const base::FilePath& filepath) {
-  if (!IsIconMutableFromFilepath(filepath))
-    return filepath.Extension();
-  return filepath.value();
-}
+IconLoader::IconGroup IconLoader::GroupForFilepath(
+    const base::FilePath& file_path) {
+  if (file_path.MatchesExtension(L".exe") ||
+      file_path.MatchesExtension(L".dll") ||
+      file_path.MatchesExtension(L".ico")) {
+    return file_path.value();
+  }
 
-// static
-bool IconLoader::IsIconMutableFromFilepath(const base::FilePath& filepath) {
-  return filepath.MatchesExtension(L".exe") ||
-         filepath.MatchesExtension(L".dll") ||
-         filepath.MatchesExtension(L".ico");
+  return file_path.Extension();
 }
 
 // static