fix the bugs of getSyncParameter in gl-object-get-calls.html

gpu/blink/webgraphicscontext3d_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 #define GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 209 matching lines @@
   blink::WebString getShaderInfoLog(blink::WebGLId shader) override;
 
   void getShaderPrecisionFormat(blink::WGC3Denum shadertype,
                                 blink::WGC3Denum precisiontype,
                                 blink::WGC3Dint* range,
                                 blink::WGC3Dint* precision) override;
 
   blink::WebString getShaderSource(blink::WebGLId shader) override;
   blink::WebString getString(blink::WGC3Denum name) override;
 
+  void getSynciv(blink::WGC3Dsync sync,
+                 blink::WGC3Denum pname,
+                 blink::WGC3Dsizei bufSize,
+                 blink::WGC3Dsizei *length,
+                 blink::WGC3Dint *params) override;
+
   void getTexParameterfv(blink::WGC3Denum target,
                          blink::WGC3Denum pname,
                          blink::WGC3Dfloat* value) override;
   void getTexParameteriv(blink::WGC3Denum target,
                          blink::WGC3Denum pname,
                          blink::WGC3Dint* value) override;
 
   void getUniformfv(blink::WebGLId program,
                     blink::WGC3Dint location,
                     blink::WGC3Dfloat* value) override;
@@ skipping 731 matching lines @@
   std::vector<blink::WGC3Denum> synthetic_errors_;
 
   ::gpu::gles2::GLES2Interface* gl_;
   bool lose_context_when_out_of_memory_;
   uint32_t flush_id_;
 };
 
 }  // namespace gpu_blink
 
 #endif  // GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_