Make dart:dom implementation types private so they don't muddle the docs.

client/dom/generated/src/frog/WebKitCSSMatrix.dart

 
-class WebKitCSSMatrixJs extends DOMTypeJs implements WebKitCSSMatrix native "*WebKitCSSMatrix" {
+class _WebKitCSSMatrixJs extends _DOMTypeJs implements WebKitCSSMatrix native "*WebKitCSSMatrix" {
   WebKitCSSMatrix([String spec]) native;
 
 
   num get a() native "return this.a;";
 
   void set a(num value) native "this.a = value;";
 
   num get b() native "return this.b;";
 
   void set b(num value) native "this.b = value;";
@@ skipping 71 matching lines @@
   void set m42(num value) native "this.m42 = value;";
 
   num get m43() native "return this.m43;";
 
   void set m43(num value) native "this.m43 = value;";
 
   num get m44() native "return this.m44;";
 
   void set m44(num value) native "this.m44 = value;";
 
-  WebKitCSSMatrixJs inverse() native;
+  _WebKitCSSMatrixJs inverse() native;
 
-  WebKitCSSMatrixJs multiply(WebKitCSSMatrixJs secondMatrix) native;
+  _WebKitCSSMatrixJs multiply(_WebKitCSSMatrixJs secondMatrix) native;
 
-  WebKitCSSMatrixJs rotate(num rotX, num rotY, num rotZ) native;
+  _WebKitCSSMatrixJs rotate(num rotX, num rotY, num rotZ) native;
 
-  WebKitCSSMatrixJs rotateAxisAngle(num x, num y, num z, num angle) native;
+  _WebKitCSSMatrixJs rotateAxisAngle(num x, num y, num z, num angle) native;
 
-  WebKitCSSMatrixJs scale(num scaleX, num scaleY, num scaleZ) native;
+  _WebKitCSSMatrixJs scale(num scaleX, num scaleY, num scaleZ) native;
 
   void setMatrixValue(String string) native;
 
-  WebKitCSSMatrixJs skewX(num angle) native;
+  _WebKitCSSMatrixJs skewX(num angle) native;
 
-  WebKitCSSMatrixJs skewY(num angle) native;
+  _WebKitCSSMatrixJs skewY(num angle) native;
 
   String toString() native;
 
-  WebKitCSSMatrixJs translate(num x, num y, num z) native;
+  _WebKitCSSMatrixJs translate(num x, num y, num z) native;
 }