Implement GL_EXT_occlusion_query_boolean on OSX

gpu/command_buffer/tests/occlusion_query_unittests.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 48 matching lines @@
   SetMatrix(x, z, scale, matrix);
 
   // Set up the model matrix
   glUniformMatrix4fv(matrix_loc_, 1, GL_FALSE, matrix);
   glUniform4fv(color_loc_, 1, color);
 
   glDrawArrays(GL_TRIANGLES, 0, 6);
 }
 
 TEST_F(OcclusionQueryTest, Occlusion) {
+#ifdef OS_MACOSX
+  EXPECT_TRUE(GLTestHelper::HasExtension("GL_EXT_occlusion_query_boolean"))
+      << "GL_EXT_occlusion_query_boolean is required on OSX";
+#endif
+
   if (!GLTestHelper::HasExtension("GL_EXT_occlusion_query_boolean")) {
     return;
   }
 
   static const char* v_shader_str =
       "uniform mat4 worldMatrix;\n"
       "attribute vec3 g_Position;\n"
       "void main()\n"
       "{\n"
       "   gl_Position = worldMatrix *\n"
@@ skipping 56 matching lines @@
   glGetQueryObjectuivEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT, &result);
   EXPECT_TRUE(result);
   glGetQueryObjectuivEXT(query, GL_QUERY_RESULT_EXT, &query_status);
   EXPECT_TRUE(query_status);
   GLTestHelper::CheckGLError("no errors", __LINE__);
 }
 
 }  // namespace gpu