Change X11 error handler override to allow easy X11 error checking.

gpu/command_buffer/service/vertex_attrib_manager_unittest.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 gtest.h out of order because <X11/X.h> #define's Bool & None, which
+// gtest uses as struct names (inside a namespace).  This means that
+// #include'ing gtest after anything that pulls in X.h fails to compile.
+// This is http://code.google.com/p/googletest/issues/detail?id=371
+#include "testing/gtest/include/gtest/gtest.h"
 #include "gpu/command_buffer/service/vertex_attrib_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "gpu/command_buffer/common/gl_mock.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/test_helper.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Pointee;
 using ::testing::_;
 
 namespace gpu {
 namespace gles2 {
 
 class VertexAttribManagerTest : public testing::Test {
  public:
   static const uint32 kNumVertexAttribs = 8;
@@ skipping 147 matching lines @@
   EXPECT_TRUE(info->CanAccess(1));
   manager_.SetAttribInfo(1, buffer, 4, GL_FLOAT, GL_FALSE, 0, 20, 0);
   EXPECT_TRUE(info->CanAccess(0));
   EXPECT_FALSE(info->CanAccess(1));
 
   buffer_manager.Destroy(false);
 }
 
 }  // namespace gles2
 }  // namespace gpu
-
-