Re-enable PPAPI browser tests on mac.

chrome/test/ppapi/ppapi_browsertest.cc

Index: chrome/test/ppapi/ppapi_browsertest.cc
diff --git a/chrome/test/ppapi/ppapi_browsertest.cc b/chrome/test/ppapi/ppapi_browsertest.cc
index 9642cc361dca7d5bd2ebaa8f2aeb918a059131b4..0def64eeafb1aebbba864bc8852e0586164fc2ae 100644
--- a/chrome/test/ppapi/ppapi_browsertest.cc
+++ b/chrome/test/ppapi/ppapi_browsertest.cc
@@ -229,25 +229,13 @@ TEST_PPAPI_NACL(Graphics2D_FlushOffscreenUpdate)
 TEST_PPAPI_NACL(Graphics2D_BindNull)
 
 #if defined(OS_WIN)
-#if defined(USE_AURA)
-// These tests fail with the test compositor which is what's used by default for
-// browser tests on Windows Aura. Renable when the software compositor is
-// available.
 #define MAYBE_IN_Graphics3D DISABLED_Graphics3D
 #define MAYBE_OUT_Graphics3D DISABLED_Graphics3D
 #define MAYBE_NACL_Graphics3D DISABLED_Graphics3D
-#else  // defined(USE_AURA)
-// In-process and NaCl tests are having flaky failures on Win: crbug.com/242252
-#define MAYBE_IN_Graphics3D DISABLED_Graphics3D
-#define MAYBE_OUT_Graphics3D Graphics3D
-#define MAYBE_NACL_Graphics3D DISABLED_Graphics3D
-#endif  // defined(USE_AURA)
 #elif defined(OS_MACOSX)
-// These tests fail when using the legacy software mode. Reenable when the
-// software compositor is enabled crbug.com/286038
-#define MAYBE_IN_Graphics3D DISABLED_Graphics3D
-#define MAYBE_OUT_Graphics3D DISABLED_Graphics3D
-#define MAYBE_NACL_Graphics3D DISABLED_Graphics3D
+#define MAYBE_IN_Graphics3D Graphics3D
+#define MAYBE_OUT_Graphics3D Graphics3D
+#define MAYBE_NACL_Graphics3D Graphics3D
 #else
 // The tests are failing in-process. crbug.com/280282
 #define MAYBE_IN_Graphics3D DISABLED_Graphics3D