Fix build failure on macOS with case-sensitive file system

Bug: 853046
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: I4843a076212a21ed49bdabe4ec8bc88bda5f94e5
Reviewed-on: https://chromium-review.googlesource.com/1102027Reviewed-by: David Reveman <reveman@chromium.org>
Commit-Queue: Chris Dziemborowicz <chrisdz@google.com>
Cr-Commit-Position: refs/heads/master@{#567597}

ui/gl/gl_image_io_surface_egl.h

@@ -7,7 +7,7 @@
 
 #include "ui/gl/gl_image_io_surface.h"
 
-#include <egl/EGL.h>
+#include <EGL/egl.h>
 
 namespace gl {