base: Move SplitString functions into the base namespace and update the callers.

base/string_split.h

Index: base/string_split.h
diff --git a/base/string_split.h b/base/string_split.h
index c7cb5e7bed436915f0e730f6662f64c29845677d..9e1af19f2e6475cc7024d8996896cf3d13e845ec 100644
--- a/base/string_split.h
+++ b/base/string_split.h
@@ -12,9 +12,7 @@
 
 #include "base/string16.h"
 
-// TODO(tfarina): Move the following functions into the namespace and update the
-// callers.
-//-----------------------------------------------------------------------------
+namespace base {
 
 // Splits |str| into a vector of strings delimited by |s|. Append the results
 // into |r| as they appear. If several instances of |s| are contiguous, or if
@@ -39,8 +37,6 @@ void SplitString(const std::string& str,
                  char c,
                  std::vector<std::string>* r);
 
-namespace base {
-
 bool SplitStringIntoKeyValues(
     const std::string& line,
     char key_value_delimiter,