Pass initial size and GPU preference via context attributes

cc/test/test_in_process_context_provider.cc

Index: cc/test/test_in_process_context_provider.cc
diff --git a/cc/test/test_in_process_context_provider.cc b/cc/test/test_in_process_context_provider.cc
index 43f8196156ed448689c7edc31da319f76248d5b2..2a129829215163c56802b596db1909639d6f02c1 100644
--- a/cc/test/test_in_process_context_provider.cc
+++ b/cc/test/test_in_process_context_provider.cc
@@ -39,13 +39,12 @@ std::unique_ptr<gpu::GLInProcessContext> CreateTestInProcessContext(
   attribs.sample_buffers = 0;
   attribs.fail_if_major_perf_caveat = false;
   attribs.bind_generates_resource = false;
-  gl::GpuPreference gpu_preference = gl::PreferDiscreteGpu;
 
   std::unique_ptr<gpu::GLInProcessContext> context =
       base::WrapUnique(gpu::GLInProcessContext::Create(
           nullptr, nullptr, is_offscreen, gfx::kNullAcceleratedWidget,
-          gfx::Size(1, 1), shared_context, attribs, gpu_preference,
-          gpu::SharedMemoryLimits(), gpu_memory_buffer_manager, image_factory));
+          shared_context, attribs, gpu::SharedMemoryLimits(),
+          gpu_memory_buffer_manager, image_factory));
 
   DCHECK(context);
   return context;