| Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl | 
| diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl | 
| index 275d160f16257aa65ead61d7668365126d38a8ce..66f04fccae74b86b0d826268ac118c14fe42ca0f 100644 | 
| --- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl | 
| +++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl | 
| @@ -431,7 +431,7 @@ typedef long long      GLint64; | 
| [CallWith=ScriptState] any getActiveUniforms(WebGLProgram? program, sequence<GLuint> uniformIndices, GLenum pname); | 
| GLuint getUniformBlockIndex(WebGLProgram? program, DOMString uniformBlockName); | 
| [CallWith=ScriptState] any getActiveUniformBlockParameter(WebGLProgram? program, GLuint uniformBlockIndex, GLenum pname); | 
| -    DOMString getActiveUniformBlockName(WebGLProgram? program, GLuint uniformBlockIndex); | 
| +    DOMString? getActiveUniformBlockName(WebGLProgram? program, GLuint uniformBlockIndex); | 
| void uniformBlockBinding(WebGLProgram? program, GLuint uniformBlockIndex, GLuint uniformBlockBinding); | 
|  | 
| /* Vertex Array Objects */ | 
|  |