Move StartsWith[ASCII] to base namespace.

extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc

Index: extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc
diff --git a/extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc b/extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc
index 49680add6baf72d96f928f6398a92ed6e966566f..c428af9e1bba900c646fefb89b66228bf33cefb1 100644
--- a/extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc
+++ b/extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.cc
@@ -422,12 +422,12 @@ bool HeaderMatcher::StringMatchTest::Matches(
     const std::string& str) const {
   switch (type_) {
     case kPrefix:
-      return StartsWithASCII(str, data_, case_sensitive_);
+      return base::StartsWithASCII(str, data_, case_sensitive_);
     case kSuffix:
       return EndsWith(str, data_, case_sensitive_);
     case kEquals:
       return str.size() == data_.size() &&
-             StartsWithASCII(str, data_, case_sensitive_);
+             base::StartsWithASCII(str, data_, case_sensitive_);
     case kContains:
       if (!case_sensitive_) {
         return std::search(str.begin(), str.end(), data_.begin(), data_.end(),