| Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.idl | 
| diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.idl b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.idl | 
| index a9537ebd5f2f8f0ae18e9271da89b99838623ca8..2e4f8866569e74542622a727c559f496a7790c77 100644 | 
| --- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.idl | 
| +++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.idl | 
| @@ -705,4 +705,6 @@ typedef unrestricted float GLclampf; | 
| GLsizei stride, GLintptr offset); | 
|  | 
| void viewport(GLint x, GLint y, GLsizei width, GLsizei height); | 
| + | 
| +    [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] void commit(); | 
| }; | 
|  |