Fix overly-strict parameter checking of _getCallSiteData.

runtime/observatory/lib/src/elements/script_inset.dart

Index: runtime/observatory/lib/src/elements/script_inset.dart
diff --git a/runtime/observatory/lib/src/elements/script_inset.dart b/runtime/observatory/lib/src/elements/script_inset.dart
index 17c0e77aeecc35c99a6ab4bfb0bac78d36c5398c..ee555cae32ec0dbc3d1e121a2804f685134d23d0 100644
--- a/runtime/observatory/lib/src/elements/script_inset.dart
+++ b/runtime/observatory/lib/src/elements/script_inset.dart
@@ -293,7 +293,7 @@ class FunctionDeclarationAnnotation extends DeclarationAnnotation {
     if (function.isOptimizable == false ||
         function.isInlinable == false ||
         function.deoptimizations >0) {
-      element.style.backgroundColor = "red";
+      element.style.backgroundColor = "#EEA7A7";  // Low-saturation red.
     }
 
     addLink(element, url);