Add a new driver bug workaround SANDBOX_START_EARLY

content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc

Index: content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
diff --git a/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc b/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
index ac6de8b5fe749a37ce94cdf209516ea418833246..c9cc63642d925bd12d91f3ddba0420c6bf37f592 100644
--- a/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
+++ b/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
@@ -57,6 +57,9 @@ inline bool IsArchitectureArm() {
 }
 
 void AddArmMaliGpuWhitelist(std::vector<BrokerFilePermission>* permissions) {
+  // XXX: Generalize CrosArmGpuProcessPolicy to a new

[Ken Russell (switch to Gerrit), 2016/05/04 20:36:17]

TODO(j.isorce@samsung.com) instead of XXX, here and below

+  // GpuProcessPolicyEarlySandbox and move that part to IsArchitectureArm()
+
   // Device file needed by the ARM GPU userspace.
   static const char kMali0Path[] = "/dev/mali0";
 
@@ -68,6 +71,8 @@ void AddArmMaliGpuWhitelist(std::vector<BrokerFilePermission>* permissions) {
 }
 
 void AddArmGpuWhitelist(std::vector<BrokerFilePermission>* permissions) {
+  // XXX: Generalize CrosArmGpuProcessPolicy to a new
+  // GpuProcessPolicyEarlySandbox and move that part to IsArchitectureArm()
   // On ARM we're enabling the sandbox before the X connection is made,
   // so we need to allow access to |.Xauthority|.
   static const char kXAuthorityPath[] = "/home/chronos/.Xauthority";
@@ -159,11 +164,14 @@ bool CrosArmGpuProcessPolicy::PreSandboxHook() {
   // Add ARM-specific files to whitelist in the broker.
   std::vector<BrokerFilePermission> permissions;
 
+  // XXX: Generalize CrosArmGpuProcessPolicy to a new
+  // GpuProcessPolicyEarlySandbox and move that part to IsArchitectureArm()
   AddArmGpuWhitelist(&permissions);
   InitGpuBrokerProcess(CrosArmGpuBrokerProcessPolicy::Create, permissions);
 
   const int dlopen_flag = RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE;
 
+  // XXX
   // Preload the Mali library.
   dlopen("/usr/lib/libmali.so", dlopen_flag);
   // Preload the Tegra V4L2 (video decode acceleration) library.