Adding CHECKs to troubleshoot the crash issue tuple.h/browser_render_process_host.cc

base/tuple.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // A Tuple is a generic templatized container, similar in concept to std::pair.
 // There are classes Tuple0 to Tuple6, cooresponding to the number of elements
 // it contains.  The convenient MakeTuple() function takes 0 to 6 arguments,
 // and will construct and return the appropriate Tuple object.  The functions
 // DispatchToMethod and DispatchToFunction take a function pointer or instance
 // and method pointer, and unpack a tuple into arguments to the call.
@@ skipping 526 matching lines @@
   (obj->*method)();
 }
 
 template <class ObjT, class Method, class A>
 inline void DispatchToMethod(ObjT* obj, Method method, const A& arg) {
   (obj->*method)(arg);
 }
 
 template <class ObjT, class Method, class A>
 inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<A>& arg) {
+
+#if defined(OS_CHROMEOS) && defined(CHECK)
+  // To troubleshoot crosbug.com/7327.
+  CHECK(obj);
+  CHECK(&arg);
+  CHECK(method);
+#endif
   (obj->*method)(arg.a);
 }
 
 template<class ObjT, class Method, class A, class B>
 inline void DispatchToMethod(ObjT* obj,
                              Method method,
                              const Tuple2<A, B>& arg) {
   (obj->*method)(arg.a, arg.b);
 }
 
@@ skipping 479 matching lines @@
          class InA, class InB, class InC, class InD, class InE, class InF,
          class OutA, class OutB, class OutC, class OutD, class OutE>
 inline void DispatchToMethod(ObjT* obj, Method method,
                              const Tuple6<InA, InB, InC, InD, InE, InF>& in,
                              Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
   (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f,
                  &out->a, &out->b, &out->c, &out->d, &out->e);
 }
 
 #endif  // BASE_TUPLE_H__