Adding annotations for native types of type Object or dynamic.

sdk/lib/web_gl/dart2js/web_gl_dart2js.dart

Index: sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
diff --git a/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart b/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
index efa45f50fe81062f8d432622940ca27eff09d52d..3a08cd7e4a8a11961f4426be786d0ce0aa1abd68 100644
--- a/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
+++ b/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
@@ -2295,6 +2295,8 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getBufferParameter')
   @DocsEditable
+  @Creates('int|Null')
+  @Returns('int|Null')
   Object getBufferParameter(int target, int pname) native;
 
   @DomName('WebGLRenderingContext.getContextAttributes')
@@ -2311,6 +2313,8 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getFramebufferAttachmentParameter')
   @DocsEditable
+  @Creates('int|RenderBuffer|Texture|Null')
+  @Returns('int|RenderBuffer|Texture|Null')
   Object getFramebufferAttachmentParameter(int target, int attachment, int pname) native;
 
   @DomName('WebGLRenderingContext.getParameter')
@@ -2325,10 +2329,14 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getProgramParameter')
   @DocsEditable
+  @Creates('int|bool|Null')
+  @Returns('int|bool|Null')
   Object getProgramParameter(Program program, int pname) native;
 
   @DomName('WebGLRenderingContext.getRenderbufferParameter')
   @DocsEditable
+  @Creates('int|Null')
+  @Returns('int|Null')
   Object getRenderbufferParameter(int target, int pname) native;
 
   @DomName('WebGLRenderingContext.getShaderInfoLog')
@@ -2337,6 +2345,8 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getShaderParameter')
   @DocsEditable
+  @Creates('int|Null')
+  @Returns('int|Null')
   Object getShaderParameter(Shader shader, int pname) native;
 
   @DomName('WebGLRenderingContext.getShaderPrecisionFormat')
@@ -2353,10 +2363,14 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getTexParameter')
   @DocsEditable
+  @Creates('int|Null')
+  @Returns('int|Null')
   Object getTexParameter(int target, int pname) native;
 
   @DomName('WebGLRenderingContext.getUniform')
   @DocsEditable
+  @Creates('Null|num|String|bool|=List|Float32List|Int32List|Uint32List')
+  @Returns('Null|num|String|bool|=List|Float32List|Int32List|Uint32List')
   Object getUniform(Program program, UniformLocation location) native;
 
   @DomName('WebGLRenderingContext.getUniformLocation')
@@ -2365,6 +2379,8 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
 
   @DomName('WebGLRenderingContext.getVertexAttrib')
   @DocsEditable
+  @Creates('Null|num|bool|Float32List|Buffer')
+  @Returns('Null|num|bool|Float32List|Buffer')
   Object getVertexAttrib(int index, int pname) native;
 
   @DomName('WebGLRenderingContext.getVertexAttribOffset')