Use WaitForDebuggerChildren to let renderer wait for gdb

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 0b95dda213f4478e756b8df802d049288b5f7398..5fceac1229db49310f486731dfcf9757de369d52 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1279,6 +1279,16 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
   if (IsImplSidePaintingEnabled() &&
       !browser_cmd.HasSwitch(switches::kEnableDeferredImageDecoding))
     renderer_cmd->AppendSwitch(switches::kEnableDeferredImageDecoding);
+
+  // Add kWaitForDebugger to let renderer process wait for a debugger.
+  if (browser_cmd.HasSwitch(switches::kWaitForDebuggerChildren)) {
+    // Look to pass-on the kWaitForDebugger flag.
+    std::string value =
+        browser_cmd.GetSwitchValueASCII(switches::kWaitForDebuggerChildren);
+    if (value.empty() || value == switches::kRendererProcess) {
+      renderer_cmd->AppendSwitch(switches::kWaitForDebugger);
+    }
+  }
 }
 
 base::ProcessHandle RenderProcessHostImpl::GetHandle() const {