Use nullptr in BrowserURLHandlerImpl constructor.

content/browser/browser_url_handler_impl.cc

Index: content/browser/browser_url_handler_impl.cc
diff --git a/content/browser/browser_url_handler_impl.cc b/content/browser/browser_url_handler_impl.cc
index 438feb3ac4ec7df6b51cebf8b76970cdcefce9e6..63ddf4924b8a3457dfb4e361519650e2c2a37d98 100644
--- a/content/browser/browser_url_handler_impl.cc
+++ b/content/browser/browser_url_handler_impl.cc
@@ -89,7 +89,7 @@ BrowserURLHandlerImpl* BrowserURLHandlerImpl::GetInstance() {
 }
 
 BrowserURLHandlerImpl::BrowserURLHandlerImpl() :
-    fixup_handler_(null_handler()) {
+    fixup_handler_(nullptr) {
   AddHandlerPair(&DebugURLHandler, BrowserURLHandlerImpl::null_handler());
 
   GetContentClient()->browser()->BrowserURLHandlerCreated(this);
@@ -102,7 +102,7 @@ BrowserURLHandlerImpl::~BrowserURLHandlerImpl() {
 }
 
 void BrowserURLHandlerImpl::SetFixupHandler(URLHandler handler) {
-  DCHECK_EQ(null_handler(), fixup_handler_);
+  DCHECK(fixup_handler_ == nullptr);

[Charlie Reis, 2015/04/24 21:22:52]

DCHECK_EQ wasn't happy doing the comparison between URLHandler and nullptr.

   fixup_handler_ = handler;
 }