Fix a crash in IP address checking because the boundary case for an empty or ...

src/url_canon_unittest.cc

Index: src/url_canon_unittest.cc
===================================================================
--- src/url_canon_unittest.cc	(revision 133)
+++ src/url_canon_unittest.cc	(working copy)
@@ -761,11 +761,27 @@
     if (host_info.family == CanonHostInfo::IPV6) {
       EXPECT_STREQ(cases[i].expected, out_str2.c_str());
       EXPECT_EQ(cases[i].expected_component.begin, host_info.out_host.begin);
-      EXPECT_EQ(cases[i].expected_component.len, host_info.out_host.len);
+      EXPECT_EQ(cases[i].expected_compo nent.len, host_info.out_host.len);
     }
   }
 }
 
+TEST(URLCanonTest, IPEmpty) {
+  std::string out_str1;
+  url_canon::StdStringCanonOutput output1(&out_str1);
+  url_canon::CanonHostInfo host_info;
+
+  // This tests tests.
+  const char spec[] = "192.168.0.1";
+  url_canon::CanonicalizeIPAddress(spec, url_parse::Component(),
+                                   &output1, &host_info);
+  EXPECT_FALSE(host_info.IsIPAddress());
+
+  url_canon::CanonicalizeIPAddress(spec, url_parse::Component(0, 0),
+                                   &output1, &host_info);
+  EXPECT_FALSE(host_info.IsIPAddress());
+}
+
 TEST(URLCanonTest, UserInfo) {
   // Note that the canonicalizer should escape and treat empty components as
   // not being there.