Move EqualsASCII to the base namespace.

content/test/mock_webclipboard_impl.cc

Index: content/test/mock_webclipboard_impl.cc
diff --git a/content/test/mock_webclipboard_impl.cc b/content/test/mock_webclipboard_impl.cc
index 8a6e7748e5bbfea432fb4a39b66d590d5b0c728d..eb9677b88daeb053a1afad7dfb9fe4208bd3685f 100644
--- a/content/test/mock_webclipboard_impl.cc
+++ b/content/test/mock_webclipboard_impl.cc
@@ -176,11 +176,11 @@ void MockWebClipboardImpl::writeDataObject(const WebDragData& data) {
     switch (item.storageType) {
       case WebDragData::Item::StorageTypeString: {
         ++m_sequenceNumber;
-        if (EqualsASCII(item.stringType, ui::Clipboard::kMimeTypeText)) {
+        if (base::EqualsASCII(item.stringType, ui::Clipboard::kMimeTypeText)) {
           m_plainText = item.stringData;
           continue;
         }
-        if (EqualsASCII(item.stringType, ui::Clipboard::kMimeTypeHTML)) {
+        if (base::EqualsASCII(item.stringType, ui::Clipboard::kMimeTypeHTML)) {
           m_htmlText = item.stringData;
           continue;
         }