gpu: Ensure result of CreateTexture2D shows up in minidump

hr is read from eax as 0 (S_OK) in minidumps, but that's not possible
since the CHECK fails. base::debug::Alias is a sure way of seeing the
value in minidumps.

R=piman
BUG=794735

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;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I2a92c2967cf6786c6540c49fcacfc97b888fa146
Reviewed-on: https://chromium-review.googlesource.com/998734Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548583}

ui/gl/gl_image_dxgi.cc

@@ -6,6 +6,7 @@
 
 #include <d3d11_1.h>
 
+#include "base/debug/alias.h"
 #include "third_party/khronos/EGL/egl.h"
 #include "third_party/khronos/EGL/eglext.h"
 #include "ui/gl/gl_angle_util_win.h"
@@ -236,6 +237,8 @@ bool CopyingGLImageDXGI::Initialize() {
 
   HRESULT hr = d3d11_device_->CreateTexture2D(
       &desc, nullptr, decoder_copy_texture_.GetAddressOf());
+  // TODO(sunnyps): Remove after fixing https://crbug.com/794735
+  base::debug::Alias(&hr);
   CHECK(SUCCEEDED(hr));
   EGLDisplay egl_display = gl::GLSurfaceEGL::GetHardwareDisplay();