linux: add command-line flag to allow debugging of sandboxed processes

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 6528ae185af558e948690aea6139874deb8dd889..85b08a1f262bf42603bef048cb88f20974d282cd 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -557,4 +557,7 @@ const wchar_t kEnableLocalStorage[] = L"enable-local-storage";
 // Enable session storage.  Still buggy.
 const wchar_t kEnableSessionStorage[] = L"enable-session-storage";
 
+// Allows debugging of sandboxed processes (see zygote_main_linux.cc).
+const wchar_t kAllowSandboxDebugging[] = L"allow-sandbox-debugging";
+
 }  // namespace switches