Implemented support for GL constext share groups in the renderer process.

gpu/command_buffer/service/context_group.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/common/id_allocator.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
 #include "gpu/command_buffer/service/framebuffer_manager.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.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"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "gpu/GLES2/gles2_command_buffer.h"
 #include "ui/gfx/gl/gl_implementation.h"
 
 namespace gpu {
 namespace gles2 {
 
 ContextGroup::ContextGroup()
     : initialized_(false),
       have_context_(true),
       max_vertex_attribs_(0u),
       max_texture_units_(0u),
       max_texture_image_units_(0u),
       max_vertex_texture_image_units_(0u),
       max_fragment_uniform_vectors_(0u),
       max_varying_vectors_(0u),
       max_vertex_uniform_vectors_(0u) {
+  id_namespaces_[id_namespaces::kBuffers].reset(new IdAllocator);
+  id_namespaces_[id_namespaces::kFramebuffers].reset(new IdAllocator);
+  id_namespaces_[id_namespaces::kProgramsAndShaders].reset(
+      new NonReusedIdAllocator);
+  id_namespaces_[id_namespaces::kRenderbuffers].reset(new IdAllocator);
+  id_namespaces_[id_namespaces::kTextures].reset(new IdAllocator);
 }
 
 ContextGroup::~ContextGroup() {
   Destroy();
 }
 
 static void GetIntegerv(GLenum pname, uint32* var) {
   GLint value = 0;
   glGetIntegerv(pname, &value);
   *var = value;
@@ skipping 98 matching lines @@
     program_manager_->Destroy(have_context_);
     program_manager_.reset();
   }
 
   if (shader_manager_ != NULL) {
     shader_manager_->Destroy(have_context_);
     shader_manager_.reset();
   }
 }
 
-IdAllocator* ContextGroup::GetIdAllocator(unsigned namespace_id) {
-  IdAllocatorMap::iterator it = id_namespaces_.find(namespace_id);
-  if (it != id_namespaces_.end()) {
-    return it->second.get();
-  }
-  IdAllocator* id_allocator = new IdAllocator();
-  id_namespaces_[namespace_id] = linked_ptr<IdAllocator>(id_allocator);
-  return id_allocator;
+IdAllocatorInterface* ContextGroup::GetIdAllocator(unsigned namespace_id) {
+  if (namespace_id >= arraysize(id_namespaces_))
+    return NULL;
+
+  return id_namespaces_[namespace_id].get();
 }
 
 }  // namespace gles2
 }  // namespace gpu