Add UMA histograms and logging for bad IPC message handling

content/browser/browser_child_process_host_impl.cc

Index: content/browser/browser_child_process_host_impl.cc
diff --git a/content/browser/browser_child_process_host_impl.cc b/content/browser/browser_child_process_host_impl.cc
index 3245e2ba34abb86e143a7bc7d83a980de12e1532..6ace7de4aba1f452b409a7e5532d1ae14e4d4e14 100644
--- a/content/browser/browser_child_process_host_impl.cc
+++ b/content/browser/browser_child_process_host_impl.cc
@@ -256,6 +256,8 @@ void BrowserChildProcessHostImpl::OnBadMessageReceived(
           switches::kDisableKillAfterBadIPC)) {
     return;
   }
+  LOG(ERROR) << "Terminating child process for bad IPC message of type "
+      << message.type();
   child_process_->GetProcess().Terminate(RESULT_CODE_KILLED_BAD_MESSAGE, false);
 }