Remove getError() and synthesizeGLError() from WebGraphicsContext3D.

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 <stdint.h>
 
 #include <string>
@@ skipping 31 matching lines @@
                     blink::WGC3Denum type,
                     blink::WGC3Dintptr offset) override;
 
   bool getActiveAttrib(blink::WebGLId program,
                        blink::WGC3Duint index,
                        ActiveInfo&) override;
   bool getActiveUniform(blink::WebGLId program,
                         blink::WGC3Duint index,
                         ActiveInfo&) override;
 
-  blink::WGC3Denum getError() override;
   blink::WebString getProgramInfoLog(blink::WebGLId program) override;
   blink::WebString getShaderInfoLog(blink::WebGLId shader) 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;
@@ skipping 14 matching lines @@
   blink::WebGLId createBuffer() override;
   blink::WebGLId createFramebuffer() override;
   blink::WebGLId createRenderbuffer() override;
   blink::WebGLId createTexture() override;
 
   void deleteBuffer(blink::WebGLId) override;
   void deleteFramebuffer(blink::WebGLId) override;
   void deleteRenderbuffer(blink::WebGLId) override;
   void deleteTexture(blink::WebGLId) override;
 
-  void synthesizeGLError(blink::WGC3Denum) override;
-
   blink::WebString getRequestableExtensionsCHROMIUM() override;
 
   void blitFramebufferCHROMIUM(blink::WGC3Dint srcX0,
                                blink::WGC3Dint srcY0,
                                blink::WGC3Dint srcX1,
                                blink::WGC3Dint srcY1,
                                blink::WGC3Dint dstX0,
                                blink::WGC3Dint dstY0,
                                blink::WGC3Dint dstX1,
                                blink::WGC3Dint dstY1,
@@ skipping 228 matching lines @@
   // Errors raised by synthesizeGLError().
   std::vector<blink::WGC3Denum> synthetic_errors_;
 
   ::gpu::gles2::GLES2Interface* gl_;
   bool lose_context_when_out_of_memory_;
 };
 
 }  // namespace gpu_blink
 
 #endif  // GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_