Revert of Implement '--gpu-sandbox-failures-nonfatal' flag.

content/common/sandbox_linux/sandbox_linux.cc

Index: content/common/sandbox_linux/sandbox_linux.cc
diff --git a/content/common/sandbox_linux/sandbox_linux.cc b/content/common/sandbox_linux/sandbox_linux.cc
index 32608e83e6fb98d98fff4e60ad4dc5f2f9181c1a..a30e41c416581d872f18bf2fabaac1cea33b9e31 100644
--- a/content/common/sandbox_linux/sandbox_linux.cc
+++ b/content/common/sandbox_linux/sandbox_linux.cc
@@ -79,14 +79,6 @@
 #endif
 }
 
-bool IsChromeOS() {
-#if defined(OS_CHROMEOS)
-  return true;
-#else
-  return false;
-#endif
-}
-
 // Try to open /proc/self/task/ with the help of |proc_fd|. |proc_fd| can be
 // -1. Will return -1 on error and set errno like open(2).
 int OpenProcTaskFd(int proc_fd) {
@@ -244,9 +236,9 @@
 }
 
 bool LinuxSandbox::InitializeSandboxImpl() {
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
   const std::string process_type =
-      command_line->GetSwitchValueASCII(switches::kProcessType);
+      CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+          switches::kProcessType);
 
   // We need to make absolutely sure that our sandbox is "sealed" before
   // returning.
@@ -269,20 +261,10 @@
     // even report an error about it.
     if (IsRunningTSAN())
       return false;
-
-    // The GPU process is allowed to call InitializeSandbox() with threads.
-    bool sandbox_failure_fatal = process_type != switches::kGpuProcess;
-
-    // On Chrome OS, the GPU process is only allowed to call InitializeSandbox()
-    // with threads if '--gpu-sandbox-failures-nonfatal' is passed.
-    if (IsChromeOS()) {
-      sandbox_failure_fatal |=
-          !command_line->HasSwitch(switches::kGpuSandboxFailuresNonfatal);
-    }
-
-    if (sandbox_failure_fatal)
-      LOG(FATAL) << error_message;
-
+    // The GPU process is allowed to call InitializeSandbox() with threads for
+    // now, because it loads third-party libraries.
+    if (process_type != switches::kGpuProcess)
+      CHECK(false) << error_message;
     LOG(ERROR) << error_message;
     return false;
   }