Add sandbox support for AsanCoverage.

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 237cc89deb9947af3d96fe8753e641a7c907f07a..2592c86a7d6d38a73c4e9427a3633a0d83a59bd0 100644
--- a/content/common/sandbox_linux/sandbox_linux.cc
+++ b/content/common/sandbox_linux/sandbox_linux.cc
@@ -109,7 +109,12 @@ LinuxSandbox::LinuxSandbox()
       pre_initialized_(false),
       seccomp_bpf_supported_(false),
       yama_is_enforcing_(false),
-      setuid_sandbox_client_(sandbox::SetuidSandboxClient::Create()) {
+      setuid_sandbox_client_(sandbox::SetuidSandboxClient::Create())
+#if (defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER) || \
+     defined(LEAK_SANITIZER))  && defined(OS_LINUX)
+      , sanitizer_args_(NULL)
+#endif
+{
   if (setuid_sandbox_client_ == NULL) {
     LOG(FATAL) << "Failed to instantiate the setuid sandbox client.";
   }
@@ -128,6 +133,10 @@ LinuxSandbox* LinuxSandbox::GetInstance() {
      defined(LEAK_SANITIZER))  && defined(OS_LINUX)
 // Sanitizer API call to notify the tool the sandbox is going to be turned on.
 extern "C" void __sanitizer_sandbox_on_notify(void *reserved);
+
+void LinuxSandbox::SetSanitizerArgs(void *sanitizer_args) {

[jln (very slow on Chromium), 2014/05/13 01:17:35]

style: "void* blah".

[jln (very slow on Chromium), 2014/05/13 01:17:35]

Let's respect the order of declarations in the header file and put this After
LimitAddressSpace().

[earthdok, 2014/05/14 17:00:26]

Done.

[earthdok, 2014/05/14 17:00:26]

Done.

+  sanitizer_args_ = sanitizer_args;
+}
 #endif
 
 void LinuxSandbox::PreinitializeSandbox() {
@@ -137,7 +146,7 @@ void LinuxSandbox::PreinitializeSandbox() {
      defined(LEAK_SANITIZER))  && defined(OS_LINUX)
   // Sanitizers need to open some resources before the sandbox is enabled.
   // This should not fork, not launch threads, not open a directory.
-  __sanitizer_sandbox_on_notify(/*reserved*/ NULL);
+  __sanitizer_sandbox_on_notify(sanitizer_args_);
 #endif
 
 #if !defined(NDEBUG)