Add base:: to straggling string16 in content/.

content/shell/renderer/test_runner/SpellCheckClient.cpp

Index: content/shell/renderer/test_runner/SpellCheckClient.cpp
diff --git a/content/shell/renderer/test_runner/SpellCheckClient.cpp b/content/shell/renderer/test_runner/SpellCheckClient.cpp
index 3ae2f32331d687ff36e24c2a0ba691af9182ecd1..9b2b63a7710b76358f809ceb96bd92896246e2b0 100644
--- a/content/shell/renderer/test_runner/SpellCheckClient.cpp
+++ b/content/shell/renderer/test_runner/SpellCheckClient.cpp
@@ -60,7 +60,7 @@ void SpellCheckClient::checkTextOfParagraph(const WebString& text, WebTextChecki
     vector<WebTextCheckingResult> results;
     if (mask & WebTextCheckingTypeSpelling) {
         size_t offset = 0;
-        string16 data = text;
+        base::string16 data = text;
         while (offset < data.length()) {
             int misspelledPosition = 0;
             int misspelledLength = 0;
@@ -109,7 +109,7 @@ void SpellCheckClient::finishLastTextCheck()
         return;
     vector<WebTextCheckingResult> results;
     int offset = 0;
-    string16 text = m_lastRequestedTextCheckString;
+    base::string16 text = m_lastRequestedTextCheckString;
     if (!m_spellcheck.isMultiWordMisspelling(WebString(text), &results)) {
         while (text.length()) {
             int misspelledPosition = 0;