Restore earlyouts in SignalTests on Windows for IPC flavour of the tests

content/common/gpu/client/gpu_context_tests.h

 // Copyright 2013 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.
 
 // These tests are run twice:
 // Once in a gpu test with an in-process WebGraphicsContext3D.
 // Once in a browsertest with a gpu-process WebGraphicsContext3D.
 
 #include "base/bind.h"
 #include "base/run_loop.h"
@@ skipping 24 matching lines @@
     base::RunLoop run_loop;
     context_support_->SignalQuery(
         query,
         base::Bind(
             &RunOnlyOnce, run_loop.QuitClosure(), base::Owned(new int(0))));
     run_loop.Run();
   }
 };
 
 CONTEXT_TEST_F(SignalTest, BasicSignalSyncTokenTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   const GLuint64 fence_sync = gl_->InsertFenceSyncCHROMIUM();
   gl_->ShallowFlushCHROMIUM();
 
   gpu::SyncToken sync_token;
   gl_->GenSyncTokenCHROMIUM(fence_sync, sync_token.GetData());
 
   TestSignalSyncToken(sync_token);
 };
 
 CONTEXT_TEST_F(SignalTest, EmptySignalSyncTokenTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   // Signalling something that doesn't exist should run the callback
   // immediately.
   gpu::SyncToken sync_token;
   TestSignalSyncToken(sync_token);
 };
 
 CONTEXT_TEST_F(SignalTest, InvalidSignalSyncTokenTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   // Signalling something that doesn't exist should run the callback
   // immediately.
   gpu::SyncToken sync_token(gpu::CommandBufferNamespace::GPU_IO, 0,
                             gpu::CommandBufferId::FromUnsafeValue(1297824234),
                             9123743439);
   TestSignalSyncToken(sync_token);
 };
 
 CONTEXT_TEST_F(SignalTest, BasicSignalQueryTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   unsigned query;
   gl_->GenQueriesEXT(1, &query);
   gl_->BeginQueryEXT(GL_COMMANDS_ISSUED_CHROMIUM, query);
   gl_->Finish();
   gl_->EndQueryEXT(GL_COMMANDS_ISSUED_CHROMIUM);
   TestSignalQuery(query);
   gl_->DeleteQueriesEXT(1, &query);
 };
 
 CONTEXT_TEST_F(SignalTest, SignalQueryUnboundTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   GLuint query;
   gl_->GenQueriesEXT(1, &query);
   TestSignalQuery(query);
   gl_->DeleteQueriesEXT(1, &query);
 };
 
 CONTEXT_TEST_F(SignalTest, InvalidSignalQueryUnboundTest) {
+#if defined(OS_WIN)
+  // The IPC version of ContextTestBase::SetUpOnMainThread does not succeed on
+  // some platforms.
+  if (!gl_)
+    return;
+#endif
+
   // Signalling something that doesn't exist should run the callback
   // immediately.
   TestSignalQuery(928729087);
   TestSignalQuery(928729086);
   TestSignalQuery(928729085);
   TestSignalQuery(928729083);
   TestSignalQuery(928729082);
   TestSignalQuery(928729081);
 };
 
 };