Pass initial size and GPU preference via context attributes

gpu/ipc/client/gpu_in_process_context_tests.cc

Index: gpu/ipc/client/gpu_in_process_context_tests.cc
diff --git a/gpu/ipc/client/gpu_in_process_context_tests.cc b/gpu/ipc/client/gpu_in_process_context_tests.cc
index 29488d5a8522f46f43ff9b2bc36d7c3314de4325..d73b5b5632ed25d5b950c7e64c297b05ea9dbca7 100644
--- a/gpu/ipc/client/gpu_in_process_context_tests.cc
+++ b/gpu/ipc/client/gpu_in_process_context_tests.cc
@@ -36,9 +36,8 @@ class ContextTestBase : public testing::Test {
         nullptr,                     /* surface */
         true,                        /* offscreen */
         gfx::kNullAcceleratedWidget, /* window */
-        gfx::Size(1, 1),             /* size */
         nullptr,                     /* share_context */
-        attributes, gl::PreferDiscreteGpu, gpu::SharedMemoryLimits(),
+        attributes, gpu::SharedMemoryLimits(),
         nullptr, /* gpu_memory_buffer_manager */
         nullptr /* image_factory */));
     gl_ = context_->GetImplementation();