Reapply 'Add runtimeType() to Object which returns canonicalized instances of Type'.

compiler/java/com/google/dart/compiler/DartCompiler.java

Index: compiler/java/com/google/dart/compiler/DartCompiler.java
diff --git a/compiler/java/com/google/dart/compiler/DartCompiler.java b/compiler/java/com/google/dart/compiler/DartCompiler.java
index 30577f69bec0a31dc6afa3a86b9b9f56a5042deb..3d105c39269bde749c5232e2594c5fe0d8a8466f 100644
--- a/compiler/java/com/google/dart/compiler/DartCompiler.java
+++ b/compiler/java/com/google/dart/compiler/DartCompiler.java
@@ -864,13 +864,6 @@ public class DartCompiler {
           srcCode += "\nvoid " + Elements.ASSERT_FUNCTION_NAME + "(x) {}";
         }
 
-        // inject "Type" type from 1.0 M1 specification
-        // remove once it will be added into SDK
-        // http://code.google.com/p/dart/issues/detail?id=3368
-        if (dartSrc.getUri().toString().equals("dart://core/object.dart")) {
-          srcCode += "\nclass Type {}";
-        }
-
         DartParser parser = new DartParser(dartSrc, srcCode, diet, libraryPrefixes, context,
             context.getCompilerMetrics());
         DartUnit unit = parser.parseUnit();