Added check for icons that change.

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 e686e730b2d696cb6f5e6cd31f048a3a26e25a34..62cb6f08ee258973afcc70c8e20af3d8219f9dc9 100644
--- a/chrome/browser/icon_loader_win.cc
+++ b/chrome/browser/icon_loader_win.cc
@@ -18,11 +18,14 @@
 // static
 IconGroupID IconLoader::ReadGroupIDFromFilepath(
     const base::FilePath& filepath) {
+  if (!IsIconMutableFromFilepath(filepath))
+    return filepath.Extension();
+  return filepath.value();
+}
+
+bool IconLoader::IsIconMutableFromFilepath(const base::FilePath& filepath) {
   base::FilePath::StringType extension = filepath.Extension();
-  if (extension != L".exe" && extension != L".dll" && extension != L".ico")
-    return extension;
-  else
-    return filepath.value();
+  return extension == L".exe" || extension == L".dll" || extension == L".ico";
 }
 
 void IconLoader::ReadIcon() {