gpu: Avoid scissor test for glCopyTextureCHROMIUM if possible.

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.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_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 80 matching lines @@
     GLuint half_size_handle;
     GLuint sampler_handle;
   };
 
   void DoCopyTextureInternal(const gles2::GLES2Decoder* decoder,
                              GLenum source_target,
                              GLuint source_id,
                              GLuint dest_id,
                              GLint xoffset,
                              GLint yoffset,
+                             GLint x,
+                             GLint y,
+                             GLsizei width,
+                             GLsizei height,
                              GLsizei dest_width,
                              GLsizei dest_height,
                              GLsizei source_width,
                              GLsizei source_height,
                              bool flip_y,
                              bool premultiply_alpha,
                              bool unpremultiply_alpha,
-                             const GLfloat transform_matrix[16],
-                             GLint scissor_x,
-                             GLint scissor_y,
-                             GLsizei scissor_width,
-                             GLsizei scissor_height);
+                             const GLfloat transform_matrix[16]);
 
   bool initialized_;
   typedef std::vector<GLuint> ShaderVector;
   ShaderVector vertex_shaders_;
   ShaderVector fragment_shaders_;
   typedef std::pair<int, int> ProgramMapKey;
   typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;
   ProgramMap programs_;
   GLuint buffer_id_;
   GLuint framebuffer_;
 
   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
 };
 
 }  // namespace gpu.
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_