Move base64 from 'net/base' into 'base'.

net/base/data_url.cc

Index: net/base/data_url.cc
diff --git a/net/base/data_url.cc b/net/base/data_url.cc
index fb7de686b887c2a7ddcc7947036e34c93f9244af..e30f7da1c376a0a84ed3b885e97a067b0a2329f3 100644
--- a/net/base/data_url.cc
+++ b/net/base/data_url.cc
@@ -8,9 +8,9 @@
 
 #include "net/base/data_url.h"
 
+#include "base/base64.h"
 #include "base/string_util.h"
 #include "googleurl/src/gurl.h"
-#include "net/base/base64.h"
 #include "net/base/escape.h"
 
 namespace net {
@@ -93,7 +93,7 @@ bool DataURL::Parse(const GURL& url, std::string* mime_type,
   }
 
   if (base64_encoded)
-    return Base64Decode(temp_data, data);
+    return base::Base64Decode(temp_data, data);
 
   temp_data.swap(*data);
   return true;