command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index c135e1409bf91de9834e29f2f7253ec9b6efe492..e76629060cfb5af9189541992f01e7c16038546a 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -537,6 +537,7 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   void DeleteProgramStub(GLsizei n, const GLuint* programs);
   void DeleteShaderStub(GLsizei n, const GLuint* shaders);
   void DeleteVertexArraysOESStub(GLsizei n, const GLuint* arrays);
+  void DeletePathsCHROMIUMStub(GLuint first_client_id, GLsizei range);
 
   void BufferDataHelper(
       GLenum target, GLsizeiptr size, const void* data, GLenum usage);
@@ -595,6 +596,7 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   bool SetCapabilityState(GLenum cap, bool enabled);
 
   IdHandlerInterface* GetIdHandler(int id_namespace) const;
+  RangeIdHandlerInterface* GetRangeIdHandler(int id_namespace) const;
   // IdAllocators for objects that can't be shared among contexts.
   // For now, used only for Queries. TODO(hj.r.chung) Should be added for
   // Framebuffer and Vertex array objects.