Monitor crashpad_handler for crashes [sometimes]

components/crash/content/app/crash_reporter_client.h

Index: components/crash/content/app/crash_reporter_client.h
diff --git a/components/crash/content/app/crash_reporter_client.h b/components/crash/content/app/crash_reporter_client.h
index ccc30483da621a847c31da2af5cff454d31c98e6..9f69c193dda2a220e9aec3a5d36feac4d15c1641 100644
--- a/components/crash/content/app/crash_reporter_client.h
+++ b/components/crash/content/app/crash_reporter_client.h
@@ -179,6 +179,22 @@ class CrashReporterClient {
   virtual bool ShouldEnableBreakpadMicrodumps();
 #endif
 
+#if defined(OS_MACOSX) || defined(OS_WIN)
+  // This method should return true to configure a crash reporter capable of
+  // monitoring itself for its own crashes to do so, even if self-monitoring
+  // would be expensive. "Expensive" self-monitoring dedicates an additional
+  // crash handler process to handle the crashes of the initial crash handler
+  // process.
+  //
+  // In some cases, inexpensive self-monitoring may also be available. When it
+  // is, it may be used when this method returns false. If only expensive
+  // self-monitoring is available, returning false from this function will
+  // prevent the crash handler process from being monitored for crashes at all.
+  //
+  // The default implementation returns false.
+  virtual bool ShouldMonitorCrashHandlerExpensively();
+#endif
+
   // Returns true if breakpad should run in the given process type.
   virtual bool EnableBreakpadForProcess(const std::string& process_type);
 };