GPU Watchdog to check I/O before terminating GPU process

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 9bf57997951c7f8e066b298ec22040004d323d7a..961b4d59888ed5774670a82326d26f3cf30846ea 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -13,6 +13,7 @@
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
+#include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -259,6 +260,18 @@ class GpuSandboxedProcessLauncherDelegate
       }
     }
 
+    // Enable GPU watchdog to write to a temp file to test whether I/O
+    // is a bottleneck.
+    base::FilePath temp_dir_path;
+    if (GetTempDir(&temp_dir_path)) {
+      base::FilePath temp_file_path = temp_dir_path.Append(L"gpu-watchdog.tmp");
+      result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
+                               sandbox::TargetPolicy::FILES_ALLOW_ANY,
+                               temp_file_path.value().c_str());
+      if (result != sandbox::SBOX_ALL_OK)
+        return false;
+    }
+
     return true;
   }
 #elif defined(OS_POSIX)