Convert remaining StringToLowerASCII to ToLowerASCII

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 6ff28a81ad448a83074060e76945a44cce1e076a..7e23c03534043f66207883caaea24b89a32a92af 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -534,7 +534,7 @@ std::string BlinkTestRunner::PathToLocalResource(const std::string& resource) {
   // Some layout tests use file://// which we resolve as a UNC path. Normalize
   // them to just file:///.
   std::string result = resource;
-  while (base::StringToLowerASCII(result).find("file:////") == 0) {
+  while (base::ToLowerASCII(result).find("file:////") == 0) {
     result = result.substr(0, strlen("file:///")) +
              result.substr(strlen("file:////"));
   }