Make net and ipc explicitly use the base namespace for Values.

net/proxy/proxy_script_decider.cc

Index: net/proxy/proxy_script_decider.cc
diff --git a/net/proxy/proxy_script_decider.cc b/net/proxy/proxy_script_decider.cc
index 942c195207645136246734a370550633b2cdbcd1..38bf751cd4da3e3c89ccdacbe079854911e1c058 100644
--- a/net/proxy/proxy_script_decider.cc
+++ b/net/proxy/proxy_script_decider.cc
@@ -47,10 +47,10 @@ bool LooksLikePacScript(const base::string16& script) {
 // http://code.google.com/p/chromium/issues/detail?id=18575#c20
 static const char kWpadUrl[] = "http://wpad/wpad.dat";
 
-Value* ProxyScriptDecider::PacSource::NetLogCallback(
+base::Value* ProxyScriptDecider::PacSource::NetLogCallback(
     const GURL* effective_pac_url,
     NetLog::LogLevel /* log_level */) const {
-  DictionaryValue* dict = new DictionaryValue();
+  base::DictionaryValue* dict = new base::DictionaryValue();
   std::string source;
   switch (type) {
     case PacSource::WPAD_DHCP: