Use WaitForDebuggerChildren to let renderer wait for gdb

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index f1e9b613cca16814b297e41fe0851b95a04568aa..7e91e34bd994baf3bfbc29ba7a1747b1f4faf8ce 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -937,6 +937,9 @@ const char kEnableWin32kRendererLockDown[]
     = "enable_win32k_renderer_lockdown";
 #endif
 
+// Will add kWaitForDebugger to every renderer processes.
+const char kRendererWaitForDebugger[] = "renderer-wait-for-debugger";
+
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches