Move EndsWith to base namespace.

chrome/browser/search/iframe_source.cc

Index: chrome/browser/search/iframe_source.cc
diff --git a/chrome/browser/search/iframe_source.cc b/chrome/browser/search/iframe_source.cc
index e3f0b4e9c3d5badcb066c776b83b3ae4b3a63b60..2a86a459bf14168597cbbe2b46a5acb6254e26d5 100644
--- a/chrome/browser/search/iframe_source.cc
+++ b/chrome/browser/search/iframe_source.cc
@@ -25,15 +25,15 @@ IframeSource::~IframeSource() {
 std::string IframeSource::GetMimeType(
     const std::string& path_and_query) const {
   std::string path(GURL("chrome-search://host/" + path_and_query).path());
-  if (EndsWith(path, ".js", false))
+  if (base::EndsWith(path, ".js", false))
     return "application/javascript";
-  if (EndsWith(path, ".png", false))
+  if (base::EndsWith(path, ".png", false))
     return "image/png";
-  if (EndsWith(path, ".css", false))
+  if (base::EndsWith(path, ".css", false))
     return "text/css";
-  if (EndsWith(path, ".html", false))
+  if (base::EndsWith(path, ".html", false))
     return "text/html";
-  return "";
+  return std::string();
 }
 
 bool IframeSource::ShouldServiceRequest(