Revert of gpu: Add CHROMIUM_sync_query extension.

gpu/command_buffer/service/query_manager.cc

Index: gpu/command_buffer/service/query_manager.cc
diff --git a/gpu/command_buffer/service/query_manager.cc b/gpu/command_buffer/service/query_manager.cc
index 30c036ed98d02dc0b211b5b999b7611bfd2b2a9b..9f1d3a7169c31b5c1ee640b07f6c08a71623b18b 100644
--- a/gpu/command_buffer/service/query_manager.cc
+++ b/gpu/command_buffer/service/query_manager.cc
@@ -16,7 +16,6 @@
 #include "gpu/command_buffer/service/error_state.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
-#include "ui/gl/gl_fence.h"
 
 namespace gpu {
 namespace gles2 {
@@ -389,55 +388,6 @@
 
 GetErrorQuery::~GetErrorQuery() {
 }
-
-class CommandsCompletedQuery : public QueryManager::Query {
- public:
-  CommandsCompletedQuery(QueryManager* manager,
-                         GLenum target,
-                         int32 shm_id,
-                         uint32 shm_offset);
-
-  // Overridden from QueryManager::Query:
-  virtual bool Begin() OVERRIDE;
-  virtual bool End(base::subtle::Atomic32 submit_count) OVERRIDE;
-  virtual bool Process() OVERRIDE;
-  virtual void Destroy(bool have_context) OVERRIDE;
-
- protected:
-  virtual ~CommandsCompletedQuery();
-
- private:
-  scoped_ptr<gfx::GLFence> fence_;
-};
-
-CommandsCompletedQuery::CommandsCompletedQuery(QueryManager* manager,
-                                               GLenum target,
-                                               int32 shm_id,
-                                               uint32 shm_offset)
-    : Query(manager, target, shm_id, shm_offset) {}
-
-bool CommandsCompletedQuery::Begin() { return true; }
-
-bool CommandsCompletedQuery::End(base::subtle::Atomic32 submit_count) {
-  fence_.reset(gfx::GLFence::Create());
-  DCHECK(fence_);
-  return AddToPendingQueue(submit_count);
-}
-
-bool CommandsCompletedQuery::Process() {
-  if (fence_ && !fence_->HasCompleted())
-    return true;
-  return MarkAsCompleted(0);
-}
-
-void CommandsCompletedQuery::Destroy(bool have_context) {
-  if (have_context && !IsDeleted()) {
-    fence_.reset();
-    MarkAsDeleted();
-  }
-}
-
-CommandsCompletedQuery::~CommandsCompletedQuery() {}
 
 QueryManager::QueryManager(
     GLES2Decoder* decoder,
@@ -493,9 +443,6 @@
       break;
     case GL_GET_ERROR_QUERY_CHROMIUM:
       query = new GetErrorQuery(this, target, shm_id, shm_offset);
-      break;
-    case GL_COMMANDS_COMPLETED_CHROMIUM:
-      query = new CommandsCompletedQuery(this, target, shm_id, shm_offset);
       break;
     default: {
       GLuint service_id = 0;