Reland of Revert of gpu: introduce glCopySubTextureCHROMIUM (patchset #1 id:1 of https://codereview…

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 433 matching lines @@
   virtual WebGLId createQueryEXT();
   virtual void deleteQueryEXT(WebGLId query);
   virtual WGC3Dboolean isQueryEXT(WGC3Duint query);
   virtual void beginQueryEXT(WGC3Denum target, WebGLId query);
   virtual void endQueryEXT(WGC3Denum target);
   virtual void getQueryivEXT(
       WGC3Denum target, WGC3Denum pname, WGC3Dint* params);
   virtual void getQueryObjectuivEXT(
       WebGLId query, WGC3Denum pname, WGC3Duint* params);
 
-  virtual void copyTextureCHROMIUM(WGC3Denum target, WebGLId source_id,
-                                   WebGLId dest_id, WGC3Dint level,
+  // TODO(dshwang): Remove |level| in Blink and then remove it.
+  void copyTextureCHROMIUM(WGC3Denum target,
+                           WebGLId source_id,
+                           WebGLId dest_id,
+                           WGC3Dint level,
+                           WGC3Denum internal_format,
+                           WGC3Denum dest_type) override;
+
+  void copySubTextureCHROMIUM(WGC3Denum target,
+                              WebGLId source_id,
+                              WebGLId dest_id,
+                              WGC3Dint level,
+                              WGC3Dint xoffset,
+                              WGC3Dint yoffset) override;
+
+  virtual void copyTextureCHROMIUM(WGC3Denum target,
+                                   WebGLId source_id,
+                                   WebGLId dest_id,
                                    WGC3Denum internal_format,
                                    WGC3Denum dest_type);
 
+  virtual void copySubTextureCHROMIUM(WGC3Denum target,
+                                      WebGLId sourceId,
+                                      WebGLId destId,
+                                      WGC3Dint xoffset,
+                                      WGC3Dint yoffset);
+
   virtual void bindUniformLocationCHROMIUM(WebGLId program, WGC3Dint location,
                                            const WGC3Dchar* uniform);
 
   virtual void shallowFlushCHROMIUM();
   virtual void shallowFinishCHROMIUM();
 
   virtual void genMailboxCHROMIUM(WGC3Dbyte* mailbox);
   virtual void produceTextureCHROMIUM(WGC3Denum target,
                                       const WGC3Dbyte* mailbox);
   virtual void produceTextureDirectCHROMIUM(WebGLId texture, WGC3Denum target,
@@ skipping 268 matching lines @@
   std::vector<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_