Some more refactorings of overload dispatcher generation.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 4164d84d833208be120e0ee0103e2f6b60d5c89c..8770c86b9ea122f508085ac08196085314fa6813 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -1603,6 +1603,7 @@ class CanvasRenderingContext2D extends CanvasRenderingContext {
       return;
     }
     _fillText_2(text, x, y);
+    return;
   }
 
   @DomName('CanvasRenderingContext2D._fillText_1')
@@ -1699,6 +1700,7 @@ class CanvasRenderingContext2D extends CanvasRenderingContext {
       return;
     }
     _strokeRect_2(x, y, width, height);
+    return;
   }
 
   @DomName('CanvasRenderingContext2D._strokeRect_1')
@@ -1715,6 +1717,7 @@ class CanvasRenderingContext2D extends CanvasRenderingContext {
       return;
     }
     _strokeText_2(text, x, y);
+    return;
   }
 
   @DomName('CanvasRenderingContext2D._strokeText_1')
@@ -6482,6 +6485,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setFloat32_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setFloat32_1')
@@ -6498,6 +6502,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setFloat64_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setFloat64_1')
@@ -6514,6 +6519,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setInt16_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setInt16_1')
@@ -6530,6 +6536,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setInt32_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setInt32_1')
@@ -6550,6 +6557,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setUint16_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setUint16_1')
@@ -6566,6 +6574,7 @@ class DataView extends ArrayBufferView {
       return;
     }
     _setUint32_2(byteOffset, value);
+    return;
   }
 
   @DomName('DataView._setUint32_1')
@@ -9858,6 +9867,7 @@ abstract class Element extends Node implements ElementTraversal {
       return;
     }
     _scrollIntoViewIfNeeded_2();
+    return;
   }
 
   @DomName('Element._scrollIntoViewIfNeeded_1')
@@ -10534,6 +10544,7 @@ class Entry extends NativeFieldWrapperClass1 {
       return;
     }
     _copyTo_2(parent);
+    return;
   }
 
   @DomName('Entry._copyTo_1')
@@ -10558,6 +10569,7 @@ class Entry extends NativeFieldWrapperClass1 {
       return;
     }
     _moveTo_2(parent);
+    return;
   }
 
   @DomName('Entry._moveTo_1')
@@ -11591,6 +11603,7 @@ class FileReader extends EventTarget {
       return;
     }
     _readAsText_2(blob);
+    return;
   }
 
   @DomName('FileReader._readAsText_1')
@@ -14367,6 +14380,7 @@ class InputElement extends _Element_Merged implements
       return;
     }
     _stepDown_2();
+    return;
   }
 
   @DomName('HTMLInputElement._stepDown_1')
@@ -14383,6 +14397,7 @@ class InputElement extends _Element_Merged implements
       return;
     }
     _stepUp_2();
+    return;
   }
 
   @DomName('HTMLInputElement._stepUp_1')
@@ -16638,6 +16653,7 @@ class MediaElement extends _Element_Merged {
       return;
     }
     _webkitAddKey_2(keySystem, key);
+    return;
   }
 
   @DomName('HTMLMediaElement._webkitAddKey_1')
@@ -16658,6 +16674,7 @@ class MediaElement extends _Element_Merged {
       return;
     }
     _webkitGenerateKeyRequest_2(keySystem);
+    return;
   }
 
   @DomName('HTMLMediaElement._webkitGenerateKeyRequest_1')
@@ -21996,6 +22013,7 @@ class SpeechGrammarList extends NativeFieldWrapperClass1 implements List<SpeechG
       return;
     }
     _addFromString_2(string);
+    return;
   }
 
   @DomName('SpeechGrammarList._addFromString_1')
@@ -22012,6 +22030,7 @@ class SpeechGrammarList extends NativeFieldWrapperClass1 implements List<SpeechG
       return;
     }
     _addFromUri_2(src);
+    return;
   }
 
   @DomName('SpeechGrammarList._addFromUri_1')
@@ -23474,6 +23493,7 @@ class TextAreaElement extends _Element_Merged {
       return;
     }
     _setSelectionRange_2(start, end);
+    return;
   }
 
   @DomName('HTMLTextAreaElement._setSelectionRange_1')
@@ -27650,6 +27670,7 @@ class WebSocket extends EventTarget {
       return;
     }
     _close_3();
+    return;
   }
 
   @DomName('WebSocket._close_1')