Allow the max url length to be overridden

content/public/common/common_param_traits.cc

Index: content/public/common/common_param_traits.cc
diff --git a/content/public/common/common_param_traits.cc b/content/public/common/common_param_traits.cc
index 0501683374c3fa67233cdef8a07985efd1d8f5cd..ff910d08b8257db21e227ba59092e011b14beb3f 100644
--- a/content/public/common/common_param_traits.cc
+++ b/content/public/common/common_param_traits.cc
@@ -7,6 +7,7 @@
 #include "content/public/common/content_constants.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
+#include "content/public/common/url_utils.h"
 #include "net/base/host_port_pair.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/rect.h"
@@ -50,7 +51,7 @@ struct SkBitmap_Data {
 namespace IPC {
 
 void ParamTraits<GURL>::Write(Message* m, const GURL& p) {
-  DCHECK(p.possibly_invalid_spec().length() <= content::kMaxURLChars);
+  DCHECK(p.possibly_invalid_spec().length() <= content::MaxURLChars());
 
   // Beware of print-parse inconsistency which would change an invalid
   // URL into a valid one. Ideally, the message would contain this flag
@@ -69,7 +70,7 @@ void ParamTraits<GURL>::Write(Message* m, const GURL& p) {
 
 bool ParamTraits<GURL>::Read(const Message* m, PickleIterator* iter, GURL* p) {
   std::string s;
-  if (!m->ReadString(iter, &s) || s.length() > content::kMaxURLChars) {
+  if (!m->ReadString(iter, &s) || s.length() > content::MaxURLChars()) {
     *p = GURL();
     return false;
   }