cleans up sdk patching so we no longer have unresolved names

test/codegen/expect/_js_names/_js_names.js

+var _js_names;
+(function(_js_names) {
+  'use strict';
+  // Function preserveNames: () → dynamic
+  function preserveNames() {
+  }
+  dart.defineLazyProperties(_js_names, {
+    get mangledNames() {
+      return computeMangledNames(_foreign_helper.JS_EMBEDDED_GLOBAL('=Object', dart.as(_js_embedded_names.MANGLED_NAMES, core.String)), false);
+    },
+    get reflectiveNames() {
+      return computeReflectiveNames(_js_names.mangledNames);
+    },
+    get mangledGlobalNames() {
+      return computeMangledNames(_foreign_helper.JS_EMBEDDED_GLOBAL('=Object', dart.as(_js_embedded_names.MANGLED_GLOBAL_NAMES, core.String)), true);
+    },
+    get reflectiveGlobalNames() {
+      return computeReflectiveNames(_js_names.mangledGlobalNames);
+    }
+  });
+  // Function computeMangledNames: (dynamic, bool) → Map<String, String>
+  function computeMangledNames(jsMangledNames, isGlobal) {
+    preserveNames();
+    let keys = extractKeys(jsMangledNames);
+    let result = dart.map();
+    let getterPrefix = _foreign_helper.JS_GET_NAME('GETTER_PREFIX');
+    let getterPrefixLength = getterPrefix.length;
+    let setterPrefix = _foreign_helper.JS_GET_NAME('SETTER_PREFIX');
+    for (let key of keys) {
+      let value = dart.as(_foreign_helper.JS('String', '#[#]', jsMangledNames, key), core.String);
+      result.set(key, value);
+      if (!dart.notNull(isGlobal)) {
+        if (key.startsWith(getterPrefix)) {
+          result.set(`${setterPrefix}${key.substring(getterPrefixLength)}`, `${value}=`);
+        }
+      }
+    }
+    return result;
+  }
+  // Function computeReflectiveNames: (Map<String, String>) → Map
+  function computeReflectiveNames(map) {
+    preserveNames();
+    let result = dart.map();
+    map.forEach((mangledName, reflectiveName) => {
+      result.set(reflectiveName, mangledName);
+    });
+    return result;
+  }
+  // Function extractKeys: (dynamic) → List<dynamic>
+  function extractKeys(victim) {
+    let result = _foreign_helper.JS('', '\n(function(victim, hasOwnProperty) {\n  var result = [];\n  for (var key in victim) {\n    if (hasOwnProperty.call(victim, key)) result.push(key);\n  }\n  return result;\n})(#, Object.prototype.hasOwnProperty)', victim);
+    return new _interceptors.JSArray.markFixed(result);
+  }
+  // Function unmangleGlobalNameIfPreservedAnyways: (String) → String
+  function unmangleGlobalNameIfPreservedAnyways(name) {
+    let names = _foreign_helper.JS_EMBEDDED_GLOBAL('=Object', dart.as(_js_embedded_names.MANGLED_GLOBAL_NAMES, core.String));
+    return dart.as(_js_helper.JsCache.fetch(names, name), core.String);
+  }
+  // Function unmangleAllIdentifiersIfPreservedAnyways: (String) → String
+  function unmangleAllIdentifiersIfPreservedAnyways(str) {
+    return dart.as(_foreign_helper.JS("String", "(#).replace(/[^<,> ]+/g," + "function(m) { return #[m] || m; })", str, _foreign_helper.JS_EMBEDDED_GLOBAL('', dart.as(_js_embedded_names.MANGLED_GLOBAL_NAMES, core.String))), core.String);
+  }
+  // Exports:
+  _js_names.preserveNames = preserveNames;
+  _js_names.computeMangledNames = computeMangledNames;
+  _js_names.computeReflectiveNames = computeReflectiveNames;
+  _js_names.extractKeys = extractKeys;
+  _js_names.unmangleGlobalNameIfPreservedAnyways = unmangleGlobalNameIfPreservedAnyways;
+  _js_names.unmangleAllIdentifiersIfPreservedAnyways = unmangleAllIdentifiersIfPreservedAnyways;
+})(_js_names || (_js_names = {}));