Temporarily disable GPU info collection using NVML.

There are many crashes seen on Chrome Canary inside nvml.dll, so until
a pattern can be found and a workaround proposed, stop calling into it.

Bug: 693090, 873095
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: I0204273fb88ba8b61799916d98c843f0068ccadc
Tbr: zmo@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1171376
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582307}

gpu/config/nvml_info.cc

@@ -13,7 +13,8 @@
 
 namespace {
 
-const unsigned int kDriverVersionCapacity = 80u;
+// TODO(crbug.com/873095): diagnose crashes inside nvml.dll
+// const unsigned int kDriverVersionCapacity = 80u;
 
 }  // anonymous namespace
 
@@ -35,6 +36,9 @@ bool GetNvmlDeviceInfo(uint32_t pci_device_id,
   *major_cuda_compute_capability = 0;
   *minor_cuda_compute_capability = 0;
 
+  // TODO(crbug.com/873095): diagnose crashes inside nvml.dll
+  return false;
+#if 0
   base::FilePath dll_path;
   if (!base::PathService::Get(base::DIR_PROGRAM_FILES6432, &dll_path)) {
     return false;
@@ -123,4 +127,5 @@ bool GetNvmlDeviceInfo(uint32_t pci_device_id,
     return false;
   }
   return true;
+#endif
 }