Make sudden termination into a counter....

chrome/renderer/renderer_webkitclient_impl.cc

Index: chrome/renderer/renderer_webkitclient_impl.cc
===================================================================
--- chrome/renderer/renderer_webkitclient_impl.cc	(revision 27696)
+++ chrome/renderer/renderer_webkitclient_impl.cc	(working copy)
@@ -132,6 +132,19 @@
 }
 
 void RendererWebKitClientImpl::suddenTerminationChanged(bool enabled) {
+  if (enabled) {
+    // We should not get more enables than disables, but we want it to be a
+    // non-fatal error if it does happen.
+    DCHECK_GT(sudden_termination_disables_, 0);
+    sudden_termination_disables_ = std::max(--sudden_termination_disables_, 0);
+    if (sudden_termination_disables_ != 0)
+      return;
+  } else {
+    sudden_termination_disables_++;
+    if (sudden_termination_disables_ != 1)
+      return;
+  }
+
   RenderThread* thread = RenderThread::current();
   if (thread)  // NULL in unittests.
     thread->Send(new ViewHostMsg_SuddenTerminationChanged(enabled));