Use fields in hidden native DOM classes instead of getters/setters.

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

 
 class _WebGLRenderingContextJs extends _CanvasRenderingContextJs implements WebGLRenderingContext native "*WebGLRenderingContext" {
 
   static final int ACTIVE_ATTRIBUTES = 0x8B89;
 
   static final int ACTIVE_TEXTURE = 0x84E0;
 
   static final int ACTIVE_UNIFORMS = 0x8B86;
 
   static final int ALIASED_LINE_WIDTH_RANGE = 0x846E;
@@ skipping 577 matching lines @@
   static final int VERTEX_ATTRIB_ARRAY_STRIDE = 0x8624;
 
   static final int VERTEX_ATTRIB_ARRAY_TYPE = 0x8625;
 
   static final int VERTEX_SHADER = 0x8B31;
 
   static final int VIEWPORT = 0x0BA2;
 
   static final int ZERO = 0;
 
-  int get drawingBufferHeight() native "return this.drawingBufferHeight;";
+  final int drawingBufferHeight;
 
-  int get drawingBufferWidth() native "return this.drawingBufferWidth;";
+  final int drawingBufferWidth;
 
   void activeTexture(int texture) native;
 
   void attachShader(_WebGLProgramJs program, _WebGLShaderJs shader) native;
 
   void bindAttribLocation(_WebGLProgramJs program, int index, String name) native;
 
   void bindBuffer(int target, _WebGLBufferJs buffer) native;
 
   void bindFramebuffer(int target, _WebGLFramebufferJs framebuffer) native;
@@ skipping 251 matching lines @@
   void vertexAttrib3fv(int indx, _Float32ArrayJs values) native;
 
   void vertexAttrib4f(int indx, num x, num y, num z, num w) native;
 
   void vertexAttrib4fv(int indx, _Float32ArrayJs values) native;
 
   void vertexAttribPointer(int indx, int size, int type, bool normalized, int stride, int offset) native;
 
   void viewport(int x, int y, int width, int height) native;
 }