refactor emitMemberName to be used more consistently

lib/runtime/dart_runtime.js

Index: lib/runtime/dart_runtime.js
diff --git a/lib/runtime/dart_runtime.js b/lib/runtime/dart_runtime.js
index db7522ed0acf2931015d487ad346ea524b5f7cd7..a3f365e84435343859b965a8f84542fc71d8a594 100644
--- a/lib/runtime/dart_runtime.js
+++ b/lib/runtime/dart_runtime.js
@@ -68,17 +68,18 @@ var dart, _js_helper;
     return f.apply(obj, args);
   }
 
+  // TODO(jmesserly): rename to dcall?
   function dinvokef(f/*, ...args*/) {

[Jacob, 2015/04/13 23:19:35]

dcall seems more consistent with dart. E.g
class Foo /* implements Function */ {
  call(arg1, arg2, ...);
}

[Jennifer Messerly, 2015/04/14 21:21:00]

+1 ... yeah planning to fix this in follow up, but went ahead and sent
https://codereview.chromium.org/1074923003/ ... if that one lands first I can
rebase this one to simplify the diff here.

     let args = Array.prototype.slice.call(arguments, 1);
     return checkAndCall(f, void 0, args, 'call');
   }
   dart.dinvokef = dinvokef;
 
-  function dinvoke(obj, method/*, ...args*/) {
+  function dsend(obj, method/*, ...args*/) {
     let args = Array.prototype.slice.call(arguments, 2);
     return checkAndCall(obj[method], obj, args, method);
   }
-  dart.dinvoke = dinvoke;
+  dart.dsend = dsend;
 
   function dindex(obj, index) {
     return checkAndCall(obj.get, obj, [index], '[]');
@@ -88,12 +89,7 @@ var dart, _js_helper;
   function dsetindex(obj, index, value) {
     return checkAndCall(obj.set, obj, [index, value], '[]=');
   }
-  dart.dsetindex = dindex;
-
-  function dbinary(left, op, right) {
-    return checkAndCall(left[op], left, [right], op);
-  }
-  dart.dbinary = dbinary;
+  dart.dsetindex = dsetindex;
 
   function cast(obj, type) {
     // TODO(vsm): handle non-nullable types