Use a mocked compositor for unit tests

views/run_all_unittests.cc

Index: views/run_all_unittests.cc
diff --git a/views/run_all_unittests.cc b/views/run_all_unittests.cc
index 90fd4dda1307d6c72bff14705c284856a692c29c..27b3d0ff8cd76ff588c18e34d2e7f7507b904e23 100644
--- a/views/run_all_unittests.cc
+++ b/views/run_all_unittests.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/test/test_suite.h"
+#include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "views/view.h"
@@ -18,10 +19,8 @@ class ViewTestSuite : public base::TestSuite {
     ui::RegisterPathProvider();
     ui::ResourceBundle::InitSharedInstance("en-US");
 
-#if defined(OS_LINUX)
-    // Disable GPU browser compositor during unit tests.
-    views::View::set_use_acceleration_when_possible(false);
-#endif
+    // Mock out the compositor on platforms that use it.
+    ui::gfx_test_utils::SetupTestCompositor();
   }
 };