Avoid the name "interface" since it's a macro in Windows

In Win32 some headers defines "interface" to mean struct which
makes it unsuitable to cross platform code. This instance was
hit in a jumbo experimental build where apparently enough
win32 headers were included in the translation unit.

Bug: 864986
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I1e906a46620378be2ded6a4a4868e2034cc1868b
Reviewed-on: https://chromium-review.googlesource.com/1152735Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#578715}

gpu/config/gpu_info_collector.cc

@@ -118,12 +118,13 @@ bool SupportsOOPRaster(const gl::GLVersionInfo& gl_info) {
   // call in content/gpu/gpu_main.cc?
   SkGraphics::Init();
 
-  sk_sp<const GrGLInterface> interface(gl::init::CreateGrGLInterface(gl_info));
-  if (!interface) {
+  sk_sp<const GrGLInterface> gl_interface(
+      gl::init::CreateGrGLInterface(gl_info));
+  if (!gl_interface) {
     return false;
   }
 
-  sk_sp<GrContext> gr_context = GrContext::MakeGL(std::move(interface));
+  sk_sp<GrContext> gr_context = GrContext::MakeGL(std::move(gl_interface));
   if (gr_context) {
     // TODO(backer): Stash this GrContext for future use. For now, destroy.
     return true;