command_buffer: Support instanced path rendering in gpu command buffer

gpu/command_buffer/client/gles2_implementation.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_CLIENT_GLES2_IMPLEMENTATION_H_
 #define GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_
 
 #include <list>
 #include <map>
 #include <queue>
@@ skipping 626 matching lines @@
 
   // Pack 2D arrays of char into a bucket.
   // Helper function for ShaderSource(), TransformFeedbackVaryings(), etc.
   bool PackStringsToBucket(GLsizei count,
                            const char* const* str,
                            const GLint* length,
                            const char* func_name);
 
   const std::string& GetLogPrefix() const;
 
+  bool PrepareInstancedPathCommand(const char* function_name,
+                                   GLsizei num_paths,
+                                   GLenum path_name_type,
+                                   const void* paths,
+                                   GLenum transform_type,
+                                   const GLfloat* transform_values,
+                                   ScopedTransferBufferPtr* buffer,
+                                   uint32* out_paths_shm_id,
+                                   size_t* out_paths_offset,
+                                   uint32* out_transforms_shm_id,
+                                   size_t* out_transforms_offset);
 #if defined(GL_CLIENT_FAIL_GL_ERRORS)
   void CheckGLError();
   void FailGLError(GLenum error);
 #else
   void CheckGLError() { }
   void FailGLError(GLenum /* error */) { }
 #endif
 
   void RemoveMappedBufferRangeByTarget(GLenum target);
   void RemoveMappedBufferRangeById(GLuint buffer);
@@ skipping 169 matching lines @@
 
 inline bool GLES2Implementation::GetTexParameterivHelper(
     GLenum /* target */, GLenum /* pname */, GLint* /* params */) {
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_