command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
diff --git a/gpu/command_buffer/service/context_group.cc b/gpu/command_buffer/service/context_group.cc
index 4a82c561b3a6472da7811117a26d9722d3344f1c..1cc8f243ce69b00e5d1cf3562bf87dd5b5ea179c 100644
--- a/gpu/command_buffer/service/context_group.cc
+++ b/gpu/command_buffer/service/context_group.cc
@@ -16,6 +16,7 @@
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "gpu/command_buffer/service/mailbox_manager_impl.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
+#include "gpu/command_buffer/service/path_manager.h"
 #include "gpu/command_buffer/service/program_manager.h"
 #include "gpu/command_buffer/service/renderbuffer_manager.h"
 #include "gpu/command_buffer/service/shader_manager.h"
@@ -294,6 +295,8 @@ bool ContextGroup::Initialize(
                      feature_info_->workarounds().max_vertex_uniform_vectors));
   }
 
+  path_manager_.reset(new PathManager());
+
   program_manager_.reset(new ProgramManager(
       program_cache_, max_varying_vectors_));
 
@@ -365,6 +368,11 @@ void ContextGroup::Destroy(GLES2Decoder* decoder, bool have_context) {
     texture_manager_.reset();
   }
 
+  if (path_manager_ != NULL) {
+    path_manager_->Destroy(have_context);
+    path_manager_.reset();
+  }
+
   if (program_manager_ != NULL) {
     program_manager_->Destroy(have_context);
     program_manager_.reset();