Fix gpu_ipc_service_unittests on mac_chromium_rel_ng by managing GL shared groups the same way in s…

ui/gl/gl_context_android.cc

Index: ui/gl/gl_context_android.cc
diff --git a/ui/gl/gl_context_android.cc b/ui/gl/gl_context_android.cc
index 3c67b209a9a9697d22b6669927ba97e5fd33ba21..09fb5a2355d1c5f0dddb57e86d0b41aaad4c340c 100644
--- a/ui/gl/gl_context_android.cc
+++ b/ui/gl/gl_context_android.cc
@@ -78,7 +78,7 @@ scoped_refptr<GLContext> GLContext::CreateGLContext(
   scoped_refptr<GLContext> context;
   switch (GetGLImplementation()) {
     case kGLImplementationMockGL:
-      return scoped_refptr<GLContext>(new GLContextStub());
+      return scoped_refptr<GLContext>(new GLContextStub(share_group));
     case kGLImplementationOSMesaGL:
       context = new GLContextOSMesa(share_group);
       break;