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 ba0437bfd4e389158b767c2c1398b41c33eb4d55..3257c387c7d4b74e0ac69fab046f43f0de5f708c 100644
--- a/gpu/command_buffer/service/context_group.cc
+++ b/gpu/command_buffer/service/context_group.cc
@@ -18,6 +18,7 @@
 #include "gpu/command_buffer/service/image_manager.h"
 #include "gpu/command_buffer/service/mailbox_manager.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"
@@ -68,6 +69,7 @@ ContextGroup::ContextGroup(
   id_namespaces_[id_namespaces::kTextures].reset(new IdAllocator);
   id_namespaces_[id_namespaces::kQueries].reset(new IdAllocator);
   id_namespaces_[id_namespaces::kVertexArrays].reset(new IdAllocator);
+  id_namespaces_[id_namespaces::kPaths].reset(new NonReusedIdAllocator);
 }
 
 static void GetIntegerv(GLenum pname, uint32* var) {
@@ -243,6 +245,8 @@ 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_));
 
@@ -314,6 +318,11 @@ 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();