dart2js: Create noSuchMethod handlers at runtime to reduce overhead.

sdk/lib/_internal/compiler/implementation/js_backend/minify_namer.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of js_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class MinifyNamer extends Namer {
@@ skipping 67 matching lines @@
         instanceNameMap[name] = name;
       }
       usedInstanceNames.add(name);
       // Getter and setter names are autogenerated by prepending 'g' and 's' to
       // field names.  Therefore there are some field names we don't want to
       // use.  It is implicit in the next line that the banned prefix is
       // only one character.
       if (_hasBannedPrefix(name)) usedInstanceNames.add(name.substring(1));
     }
 
-    // This list of popular instance variable names generated with:
-    // cat out.js |
-    // perl -ne '$_=~s/(?<![^a-z0-9_\$]\$)\.([a-z0-9_\$]+)/print("$1\n")/gei' |
-    // sort | uniq -c | sort -nr | head -40
-    // Removed: html, call*, hasOwnProperty.
+    // These popular names are present in most programs and deserve
+    // single character minified names.  We could determine the popular names
+    // individually per program, but that would mean that the output of the
+    // minifier was less stable from version to version of the program being
+    // minified.
     _populateSuggestedNames(
         suggestedInstanceNames,
         usedInstanceNames,
         const <String>[
-            r'$add', r'add$1', r'box_0', r'codeUnitAt$1', r'constructor',
-            r'current', r'$defineNativeClass', r'$eq', r'$ne',
+            r'$add', r'add$1', r'$and', r'codeUnitAt$1', r'$or',
+            r'current', r'$shr', r'$eq', r'$ne',
             r'getPrototypeOf', r'hasOwnProperty', r'$index', r'$indexSet',
-            r'$isJavaScriptIndexingBehavior', r'$isolateProperties',
+            r'$isJavaScriptIndexingBehavior', r'$xor',
             r'iterator', r'length', r'$lt', r'$gt', r'$le', r'$ge',
-            r'moveNext$0', r'node', r'on', r'prototype', r'push', r'self',
-            r'start', r'target', r'this_0', r'value', r'width', r'style']);
+            r'moveNext$0', r'node', r'on', r'$negate', r'push', r'self',
+            r'start', r'target', r'$shl', r'value', r'width', r'style',
+            r'noSuchMethod$1', r'$mul', r'$div', r'$sub', r'$not', r'$mod',
+            r'$tdiv']);
 
     _populateSuggestedNames(
         suggestedGlobalNames,
         usedGlobalNames,
         const <String>[
             r'Object', r'$throw', r'$eq', r'S', r'ioore', r'UnsupportedError$',
             r'length', r'$sub', r'getInterceptor$JSArrayJSString', r'$add',
             r'$gt', r'$ge', r'$lt', r'$le', r'add', r'getInterceptor$JSNumber',
             r'iterator', r'$index', r'iae', r'getInterceptor$JSArray',
             r'ArgumentError$', r'BoundClosure', r'StateError$',
             r'getInterceptor', r'max', r'$mul', r'List_List', r'Map_Map',
             r'getInterceptor$JSString', r'$div', r'$indexSet',
             r'List_List$from', r'Set_Set$from', r'toString', r'toInt', r'min',
             r'StringBuffer_StringBuffer', r'contains1', r'WhereIterable$',
             r'RangeError$value', r'JSString', r'JSNumber',
-            r'JSArray'
+            r'JSArray', r'createInvocationMirror'
             ]);
   }
 
   void _populateSuggestedNames(Map<String, String> suggestionMap,
                                Set<String> used,
                                List<String> suggestions) {
     int c = $a - 1;
     String letter;
     for (String name in suggestions) {
       do {
@@ skipping 82 matching lines @@
   }
 
   int _alphaNumericNumber(int x) {
     if (x >= ALPHANUMERIC_CHARACTERS) x %= ALPHANUMERIC_CHARACTERS;
     if (x < 26) return $a + x;
     if (x < 52) return $A + x - 26;
     return $0 + x - 52;
   }
 
 }