Remive uses of "void operator[]() => ..." in the html library and enable return type checks for all…

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
===================================================================
--- sdk/lib/html/dart2js/html_dart2js.dart	(revision 15068)
+++ sdk/lib/html/dart2js/html_dart2js.dart	(working copy)
@@ -8962,7 +8962,7 @@
 
   num operator[](int index) => JS("num", "#[#]", this, index);
 
-  void operator[]=(int index, num value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, num value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<num> mixins.
   // num is the element type.
 
@@ -9073,7 +9073,7 @@
 
   num operator[](int index) => JS("num", "#[#]", this, index);
 
-  void operator[]=(int index, num value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, num value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<num> mixins.
   // num is the element type.
 
@@ -11194,7 +11194,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.
 
@@ -11305,7 +11305,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.
 
@@ -11416,7 +11416,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.
 
@@ -16652,7 +16652,7 @@
 
   String operator [](String key) => $dom_getItem(key);
 
-  void operator []=(String key, String value) => $dom_setItem(key, value);
+  void operator []=(String key, String value) { $dom_setItem(key, value); }
 
   String putIfAbsent(String key, String ifAbsent()) {
     if (!containsKey(key)) this[key] = ifAbsent();
@@ -17996,7 +17996,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.
 
@@ -18107,7 +18107,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.
 
@@ -18218,7 +18218,7 @@
 
   int operator[](int index) => JS("int", "#[#]", this, index);
 
-  void operator[]=(int index, int value) => JS("void", "#[#] = #", this, index, value);
+  void operator[]=(int index, int value) { JS("void", "#[#] = #", this, index, value); }
   // -- start List<int> mixins.
   // int is the element type.