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 ae4550cbda0dfc9397d8dafc271ae9afd94de580..677a1944778198101d633687d1fc25acea490f62 100644
--- a/gpu/command_buffer/service/context_group.h
+++ b/gpu/command_buffer/service/context_group.h
@@ -31,6 +31,7 @@ class GLES2Decoder;
 class FramebufferManager;
 class MailboxManager;
 class RenderbufferManager;
+class PathManager;
 class ProgramManager;
 class ShaderManager;
 class TextureManager;
@@ -130,6 +131,8 @@ 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();
   }
@@ -201,6 +204,8 @@ 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_;