Re-land: gpu: Add CHROMIUM_sync_query extension.

gpu/command_buffer/tests/gl_query_unittest.cc

 // Copyright 2014 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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
 #include "base/threading/platform_thread.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
@@ skipping 132 matching lines @@
 
   query_result = 0;
   available = 0;
   glGetQueryObjectuivEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT, &available);
   EXPECT_TRUE(available);
   glGetQueryObjectuivEXT(query, GL_QUERY_RESULT_EXT, &query_result);
 
   EXPECT_LE(query_result, kTimePrecisionMicroseconds);
 }
 
+TEST_F(QueryTest, SyncQueryBasic) {
+  EXPECT_TRUE(GLTestHelper::HasExtension("GL_CHROMIUM_sync_query"));
+
+  GLuint query = 0;
+  glGenQueriesEXT(1, &query);
+
+  glBeginQueryEXT(GL_COMMANDS_COMPLETED_CHROMIUM, query);
+  glEndQueryEXT(GL_COMMANDS_COMPLETED_CHROMIUM);
+
+  glFinish();
+
+  GLuint available = 0;
+  glGetQueryObjectuivEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT, &available);
+  EXPECT_TRUE(available);
+}
+
 }  // namespace gpu