Make methods in Stopwatch getters and rename to be more consistent.

lib/compiler/samples/leap/leap_leg.dart

Index: lib/compiler/samples/leap/leap_leg.dart
diff --git a/lib/compiler/samples/leap/leap_leg.dart b/lib/compiler/samples/leap/leap_leg.dart
index 5890ab97293f43c15918b89b6afc2a23a98a1588..c04f674e6e373f77fde2d7f8bbe544b675f9ef9f 100644
--- a/lib/compiler/samples/leap/leap_leg.dart
+++ b/lib/compiler/samples/leap/leap_leg.dart
@@ -127,7 +127,7 @@ class Runner {
     Stopwatch sw = new Stopwatch()..start();
     compiler.scanBuiltinLibraries();
     sw.stop();
-    return 'Scanned core libraries in ${sw.elapsedInMs()}ms';
+    return 'Scanned core libraries in ${sw.elapsedMilliseconds}ms';
   }
 
   String update(String codeText) {
@@ -197,7 +197,7 @@ class Runner {
       }
     }
 
-    compiler.log("Outline ${sw.elapsedInMs()}");
+    compiler.log("Outline ${sw.elapsedMilliseconds}");
     return sb.toString();
   }
 
@@ -270,7 +270,7 @@ class LeapCompiler extends Compiler {
       log('compilation failed');
       return null;
     }
-    log('compilation succeeded: ${sw.elapsedInMs()}ms');
+    log('compilation succeeded: ${sw.elapsedMilliseconds}ms');
     return e;
   }