Reapply "Collect call site information and use that for estimating parameter types"

lib/compiler/implementation/universe.dart

Index: lib/compiler/implementation/universe.dart
diff --git a/lib/compiler/implementation/universe.dart b/lib/compiler/implementation/universe.dart
index 28c24913bdc5c66571dcc13e248545c0a69e6e2d..0f2cd478853617d08d55f22ec6a21cb93bb73d5a 100644
--- a/lib/compiler/implementation/universe.dart
+++ b/lib/compiler/implementation/universe.dart
@@ -285,7 +285,7 @@ class Selector implements Hashable {
     return orderedNamedArguments;
   }
 
-  toString() => '$kind $argumentCount';
+  toString() => 'Selector($kind, $argumentCount)';
 }
 
 class TypedSelector extends Selector {
@@ -349,4 +349,6 @@ class TypedSelector extends Selector {
 
     return false;
   }
+
+  toString() => 'TypedSelector($kind, $receiverType, $argumentCount)';
 }