gl_tests: Use zero size gl surface for offscreen rendering

gpu/command_buffer/common/unittest_main.cc

Index: gpu/command_buffer/common/unittest_main.cc
diff --git a/gpu/command_buffer/common/unittest_main.cc b/gpu/command_buffer/common/unittest_main.cc
index 874bae72d8abd9d4e62e35fb3f32d75f6c14f057..2e44c25bcf9dae5fa2f932059f25cd2a5286c0f9 100644
--- a/gpu/command_buffer/common/unittest_main.cc
+++ b/gpu/command_buffer/common/unittest_main.cc
@@ -10,6 +10,11 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(USE_OZONE)
+#include "base/message_loop/message_loop.h"
+#include "ui/ozone/public/ozone_platform.h"
+#endif
+
 namespace {
 
 class NoAtExitBaseTestSuite : public base::TestSuite {
@@ -33,6 +38,11 @@ int main(int argc, char** argv) {
   base::AtExitManager exit_manager;
 #endif
   base::CommandLine::Init(argc, argv);
+#if defined(USE_OZONE)
+  base::MessageLoopForUI main_loop;
+  ui::OzonePlatform::InitializeForUI();
+  ui::OzonePlatform::InitializeForGPU();
+#endif
   testing::InitGoogleMock(&argc, argv);
   return base::LaunchUnitTests(argc,
                                argv,