Revert 239759 "The comment in base64.h implies that base::Base64..."

trunk/src/base/base64.h

Index: trunk/src/base/base64.h
===================================================================
--- trunk/src/base/base64.h	(revision 239920)
+++ trunk/src/base/base64.h	(working copy)
@@ -12,8 +12,9 @@
 
 namespace base {
 
-// Encodes the input string in base64.
-BASE_EXPORT void Base64Encode(const StringPiece& input, std::string* output);
+// Encodes the input string in base64.  Returns true if successful and false
+// otherwise.  The output string is only modified if successful.
+BASE_EXPORT bool Base64Encode(const StringPiece& input, std::string* output);
 
 // Decodes the base64 input string.  Returns true if successful and false
 // otherwise.  The output string is only modified if successful.