Make base::Base64Encode() return void

base/base64.cc

Index: base/base64.cc
diff --git a/base/base64.cc b/base/base64.cc
index 9514b0a5c2ca7d44d5d24b692cb7ab8a004aeeeb..84f5f548c80d059c4efc321ee02a6bffb1175611 100644
--- a/base/base64.cc
+++ b/base/base64.cc
@@ -12,13 +12,8 @@ bool Base64Encode(const StringPiece& input, std::string* output) {
   std::string temp;
   temp.resize(modp_b64_encode_len(input.size()));  // makes room for null byte
 
-  // null terminates result since result is base64 text!
-  int input_size = static_cast<int>(input.size());
-
   // modp_b64_encode_len() returns at least 1, so temp[0] is safe to use.
-  size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input_size);
-  if (output_size == MODP_B64_ERROR)
-    return false;
+  size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input.size());
 
   temp.resize(output_size);  // strips off null byte
   output->swap(temp);