Add a new driver bug workaround SANDBOX_START_EARLY

base/sys_info_posix.cc

Index: base/sys_info_posix.cc
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc
index 85ae039118986d211ea3964e38f271c4beb3a026..0ed9065ef9f03d4890856652490f8c2ee95c91b4 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -113,8 +113,8 @@ std::string SysInfo::OperatingSystemName() {
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 // static
 std::string SysInfo::OperatingSystemVersion() {
-  struct utsname info;
-  if (uname(&info) < 0) {
+  static struct utsname info = {};

[rickyz (no longer on Chrome), 2016/06/28 05:58:00]

Did this previously need to be thread safe?

[Julien Isorce Samsung, 2016/06/28 16:01:40]

piman noted ealier that this change is not thread safe:
https://codereview.chromium.org/1542013005/diff/120001/base/sys_info_posix.cc...
so I suspect it needs to be thread safe.
In any case that is not a big deal I can add a new parameter "os_version" to the
helper gpu::ApplyGpuDriverBugWorkarounds() which is called in gpu_main.cc after
that the sandbox is started. The call to SysInfo::OperatingSystemVersion() is
done from GpuControlList::MakeDecision. See also my other reply I made in the
link I pointed above.
I would say we should not focus on this issue for now, this is just a small
collateral damage which I think I can workaround easily. But I agree it will
have to be fixed before we land the CL if we go there.

+  if (!strlen(info.release) && uname(&info) < 0) {
     NOTREACHED();
     return std::string();
   }