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..17b6114c13e48896ca960e4570c609e46120b44e 100644
--- a/gpu/command_buffer/common/unittest_main.cc
+++ b/gpu/command_buffer/common/unittest_main.cc
@@ -5,11 +5,16 @@
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/message_loop/message_loop.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(OS_MACOSX)
+#include "base/mac/scoped_nsautorelease_pool.h"
+#endif
+
 namespace {
 
 class NoAtExitBaseTestSuite : public base::TestSuite {
@@ -20,6 +25,7 @@ class NoAtExitBaseTestSuite : public base::TestSuite {
 };
 
 int RunTestSuite(int argc, char** argv) {
+  base::MessageLoop message_loop;
   return NoAtExitBaseTestSuite(argc, argv).Run();
 }
 
@@ -33,6 +39,9 @@ int main(int argc, char** argv) {
   base::AtExitManager exit_manager;
 #endif
   base::CommandLine::Init(argc, argv);
+#if defined(OS_MACOSX)
+  base::mac::ScopedNSAutoreleasePool autorelease_pool;
+#endif
   testing::InitGoogleMock(&argc, argv);
   return base::LaunchUnitTests(argc,
                                argv,