Fix low risk trivial non-nullable =>nullable idl mismatch in WebGL2RenderingContextBase.idl

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 typedef long long GLint64;
 typedef unsigned long long GLuint64;
 
 [
     NoInterfaceObject,
 ] interface WebGL2RenderingContextBase {
@@ skipping 373 matching lines @@
     void drawBuffers(sequence<GLenum> buffers);
     void clearBufferiv(GLenum buffer, GLint drawbuffer, Int32Array value);
     void clearBufferiv(GLenum buffer, GLint drawbuffer, sequence<GLint> value);
     void clearBufferuiv(GLenum buffer, GLint drawbuffer, Uint32Array value);
     void clearBufferuiv(GLenum buffer, GLint drawbuffer, sequence<GLuint> value);
     void clearBufferfv(GLenum buffer, GLint drawbuffer, Float32Array value);
     void clearBufferfv(GLenum buffer, GLint drawbuffer, sequence<GLfloat> value);
     void clearBufferfi(GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
 
     /* Query Objects */
-    WebGLQuery createQuery();
+    WebGLQuery? createQuery();
     void deleteQuery(WebGLQuery? query);
     GLboolean isQuery(WebGLQuery? query);
     void beginQuery(GLenum target, WebGLQuery query);
     void endQuery(GLenum target);
     [CallWith=ScriptState] any getQuery(GLenum target, GLenum pname);
     [CallWith=ScriptState] any getQueryParameter(WebGLQuery query, GLenum pname);
 
     /* Sampler Objects */
-    WebGLSampler createSampler();
+    WebGLSampler? createSampler();
     void deleteSampler(WebGLSampler? sampler);
     GLboolean isSampler(WebGLSampler? sampler);
     void bindSampler(GLuint unit, WebGLSampler? sampler);
     void samplerParameteri(WebGLSampler sampler, GLenum pname, GLint param);
     void samplerParameterf(WebGLSampler sampler, GLenum pname, GLfloat param);
     [CallWith=ScriptState] any getSamplerParameter(WebGLSampler sampler, GLenum pname);
 
     /* Sync objects */
-    WebGLSync fenceSync(GLenum condition, GLbitfield flags);
+    WebGLSync? fenceSync(GLenum condition, GLbitfield flags);
     GLboolean isSync(WebGLSync? sync);
     void deleteSync(WebGLSync? sync);
     GLenum clientWaitSync(WebGLSync sync, GLbitfield flags, GLuint64 timeout);
     void waitSync(WebGLSync sync, GLbitfield flags, GLint64 timeout);
 
     [CallWith=ScriptState] any getSyncParameter(WebGLSync sync, GLenum pname);
 
     /* Transform Feedback */
-    WebGLTransformFeedback createTransformFeedback();
+    WebGLTransformFeedback? createTransformFeedback();
     void deleteTransformFeedback(WebGLTransformFeedback? feedback);
     GLboolean isTransformFeedback(WebGLTransformFeedback? feedback);
     void bindTransformFeedback(GLenum target, WebGLTransformFeedback? feedback);
     void beginTransformFeedback(GLenum primitiveMode);
     void endTransformFeedback();
     void transformFeedbackVaryings(WebGLProgram program, sequence<DOMString> varyings, GLenum bufferMode);
-    WebGLActiveInfo getTransformFeedbackVarying(WebGLProgram program, GLuint index);
+    WebGLActiveInfo? getTransformFeedbackVarying(WebGLProgram program, GLuint index);
     void pauseTransformFeedback();
     void resumeTransformFeedback();
 
     /* Uniform Buffer Objects and Transform Feedback Buffers */
     void bindBufferBase(GLenum target, GLuint index, WebGLBuffer? buffer);
     void bindBufferRange(GLenum target, GLuint index, WebGLBuffer? buffer, GLintptr offset, GLsizeiptr size);
     [CallWith=ScriptState] any getIndexedParameter(GLenum target, GLuint index);
     sequence<GLuint>? getUniformIndices(WebGLProgram program, sequence<DOMString> uniformNames);
     [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);
     void uniformBlockBinding(WebGLProgram program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
 
     /* Vertex Array Objects */
-    WebGLVertexArrayObject createVertexArray();
+    WebGLVertexArrayObject? createVertexArray();
     void deleteVertexArray(WebGLVertexArrayObject? vertexArray);
     GLboolean isVertexArray(WebGLVertexArrayObject? vertexArray);
     void bindVertexArray(WebGLVertexArrayObject? vertexArray);
 
     /* Reading */
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView dstData, GLintptr offset);
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLintptr offset);
 };
 WebGL2RenderingContextBase implements WebGLRenderingContextBase;