Update some uses of Value in chrome/browser to use the base:: namespace.

chrome/browser/net/chrome_network_delegate.h

Index: chrome/browser/net/chrome_network_delegate.h
diff --git a/chrome/browser/net/chrome_network_delegate.h b/chrome/browser/net/chrome_network_delegate.h
index 81601502780c83f603f654f7862e0810b4864db9..e50513ee9d9b5d93e679816bdffcd3127d802dc3 100644
--- a/chrome/browser/net/chrome_network_delegate.h
+++ b/chrome/browser/net/chrome_network_delegate.h
@@ -124,11 +124,11 @@ class ChromeNetworkDelegate : public net::NetworkDelegate {
   // Creates a Value summary of the persistent state of the network session.
   // The caller is responsible for deleting the returned value.
   // Must be called on the UI thread.
-  static Value* HistoricNetworkStatsInfoToValue();
+  static base::Value* HistoricNetworkStatsInfoToValue();
 
   // Creates a Value summary of the state of the network session. The caller is
   // responsible for deleting the returned value.
-  Value* SessionNetworkStatsInfoToValue() const;
+  base::Value* SessionNetworkStatsInfoToValue() const;
 
  private:
   friend class ChromeNetworkDelegateTest;