Add three of the six extensions to PAC that Internet Explorer supports.

The following descriptions were taken from <http://blogs.msdn.com/wndp/articles/IPV6_PAC_Extensions_v0_9.aspx> 

---------------------------- 
* myIpAddressEx(): 
Returns a semi-colon delimited string containing all IP addresses for localhost (IPv6 and/or IPv4), or an empty string if unable to resolve localhost to an IP address. 

* dnsResolveEx(host): 
Returns semi-colon delimited string containing IPv6 and IPv4 addresses or an empty string if host is not resolvable. 

* isResolvableEx(): 
Returns TRUE if the host is resolvable to a IPv4 or IPv6 address, FALSE otherwise. 
---------------------------- 

These differ from the vanilla PAC functions in the following ways: 

* myIpAddressEx() returns all the addrsses for localhost (including IPv6 ones), whereas myIpAddress() only returns the first IPv4 one. 
* On failure, myIpAddress() returns "127.0.0.1" whereas on failure myIpAddressEx() returns empty string. 
* dnsResolveEx() returns a list of addresses (including IPV6 ones), whereas dnsResolve() only returns the first IPv4 address. 
* On failure, dnsResolve() returns |null|, whereas on failure dnsResolveEx() returns empty string. 

BUG=25407
TEST=ProxyResolverV8Test.DNSResolutionFailure, ProxyResolverJSBindingsTest.RestrictAddressFamily, ProxyResolverJSBindingsTest.ExFunctionsReturnList
Review URL: http://codereview.chromium.org/333006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30127 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 35 insertions, 1 deletions

diff --git a/net/data/proxy_resolver_v8_unittest/bindings.js b/net/data/proxy_resolver_v8_unittest/bindings.js
index 0e748c1..3026569 100644
--- a/net/data/proxy_resolver_v8_unittest/bindings.js
+++ b/net/data/proxy_resolver_v8_unittest/bindings.js
@@ -35,10 +35,17 @@ function FindProxyForURL(url, host) {
     alert(e);
   }
 
-  // Call myIpAddress() with wonky arguments 
+  // Call myIpAddress() with wonky arguments
   myIpAddress(null);
   myIpAddress(null, null);
 
+  // Call myIpAddressEx() correctly (no arguments).
+  myIpAddressEx();
+
+  // Call dnsResolveEx() (note that isResolvableEx() implicity calls it.)
+  isResolvableEx("is_resolvable");
+  dnsResolveEx("foobar");
+
   return "DIRECT";
 }
 
diff --git a/net/data/proxy_resolver_v8_unittest/dns_fail.js b/net/data/proxy_resolver_v8_unittest/dns_fail.js
new file mode 100644
index 0000000..c71bcc3
--- /dev/null
+++ b/net/data/proxy_resolver_v8_unittest/dns_fail.js
@@ -0,0 +1,27 @@
+// This script should be run in an environment where all DNS resolution are
+// failing. It tests that functions return the expected values.
+//
+// Returns "PROXY success:80" on success.
+function FindProxyForURL(url, host) {
+  try {
+    expectEq("127.0.0.1", myIpAddress());
+    expectEq("", myIpAddressEx());
+
+    expectEq(null, dnsResolve("not-found"));
+    expectEq("", dnsResolveEx("not-found"));
+
+    expectEq(false, isResolvable("not-found"));
+    expectEq(false, isResolvableEx("not-found"));
+
+    return "PROXY success:80";
+  } catch(e) {
+    alert(e);
+    return "PROXY failed:80";
+  }
+}
+
+function expectEq(expected, actual) {
+  if (expected != actual)
+    throw "Expected " + expected + " but was " + actual;
+}
+