Add suppression for deprecated CGDisplayIOServicePort call

This has no obviously correct replacement

TBR=zmo
BUG=650837
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://chromiumcodereview.appspot.com/2443783002
Cr-Commit-Position: refs/heads/master@{#426956}

gpu/config/gpu_info_collector_mac.mm

@@ -54,6 +54,12 @@ UInt32 GetEntryProperty(io_registry_entry_t entry, CFStringRef property_name) {
   return value;
 }
 
+// CGDisplayIOServicePort is deprecated as of macOS 10.9, but has no
+// replacement.
+// https://crbug.com/650837
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
 // Find the info of the current GPU.
 GPUInfo::GPUDevice GetActiveGPU() {
   GPUInfo::GPUDevice gpu;
@@ -63,6 +69,8 @@ GPUInfo::GPUDevice GetActiveGPU() {
   return gpu;
 }
 
+#pragma clang diagnostic pop
+
 // Scan IO registry for PCI video cards.
 CollectInfoResult CollectPCIVideoCardInfo(GPUInfo* gpu_info) {
   DCHECK(gpu_info);