Move StringToLowerASCII to base namespace

net/websockets/websocket_handshake_handler.cc

Index: net/websockets/websocket_handshake_handler.cc
diff --git a/net/websockets/websocket_handshake_handler.cc b/net/websockets/websocket_handshake_handler.cc
index 787dde682e784471b3cd1919633859f698a0fb57..63247109b689c2c8cf6df6c60bdbc4ee1e6dea2c 100644
--- a/net/websockets/websocket_handshake_handler.cc
+++ b/net/websockets/websocket_handshake_handler.cc
@@ -270,14 +270,14 @@ bool WebSocketHandshakeRequestHandler::GetRequestHeaderBlock(
       // SPDY. We should omit them from a Sec-WebSocket-Extension header.
       std::string name;
       if (spdy_protocol_version <= 2)
-        name = StringToLowerASCII(iter.name());
+        name = base::StringToLowerASCII(iter.name());
       else
-        name = ":" + StringToLowerASCII(iter.name());
+        name = ":" + base::StringToLowerASCII(iter.name());
       (*headers)[name] = iter.values();
       continue;
     }
     // Others should be sent out to |headers|.
-    std::string name = StringToLowerASCII(iter.name());
+    std::string name = base::StringToLowerASCII(iter.name());
     SpdyHeaderBlock::iterator found = headers->find(name);
     if (found == headers->end()) {
       (*headers)[name] = iter.values();