Move StringToLowerASCII to base namespace

android_webview/browser/aw_content_browser_client.cc

Index: android_webview/browser/aw_content_browser_client.cc
diff --git a/android_webview/browser/aw_content_browser_client.cc b/android_webview/browser/aw_content_browser_client.cc
index c189a3817c1a8265c828ef09799e8f2abe79cb63..22ad15ae266b610783591a86d74abbb24693ef18 100644
--- a/android_webview/browser/aw_content_browser_client.cc
+++ b/android_webview/browser/aw_content_browser_client.cc
@@ -168,7 +168,7 @@ std::string AwContentBrowserClient::GetAcceptLangsImpl() {
 
   // If we're not en-US, add in en-US which will be
   // used with a lower q-value.
-  if (StringToLowerASCII(langs) != "en-us") {
+  if (base::StringToLowerASCII(langs) != "en-us") {
     langs += ",en-US";
   }
   return langs;