command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

gpu/command_buffer/service/context_group.h

Index: gpu/command_buffer/service/context_group.h
diff --git a/gpu/command_buffer/service/context_group.h b/gpu/command_buffer/service/context_group.h
index 466f918a19c217f9b3e24815ecdd034bff0ae6e0..32dbbf3547fd0a4421949293efeaf0cad10b31d3 100644
--- a/gpu/command_buffer/service/context_group.h
+++ b/gpu/command_buffer/service/context_group.h
@@ -32,6 +32,7 @@ class GLES2Decoder;
 class FramebufferManager;
 class MailboxManager;
 class RenderbufferManager;
+class PathManager;
 class ProgramManager;
 class ShaderManager;
 class TextureManager;
@@ -153,6 +154,8 @@ class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
     return texture_manager_.get();
   }
 
+  PathManager* path_manager() const { return path_manager_.get(); }
+
   ProgramManager* program_manager() const {
     return program_manager_.get();
   }
@@ -291,6 +294,8 @@ class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
 
   scoped_ptr<TextureManager> texture_manager_;
 
+  scoped_ptr<PathManager> path_manager_;
+
   scoped_ptr<ProgramManager> program_manager_;
 
   scoped_ptr<ShaderManager> shader_manager_;