Simplify EncodePageState to return no value.

content/common/page_state_serialization.cc

Index: content/common/page_state_serialization.cc
diff --git a/content/common/page_state_serialization.cc b/content/common/page_state_serialization.cc
index 7a917d6f3945b500b8be7feae3cf7be1380629fb..c0816164d4f1263bdcc6fdb0cdf4a2a74bd5e1ae 100644
--- a/content/common/page_state_serialization.cc
+++ b/content/common/page_state_serialization.cc
@@ -741,12 +741,11 @@ bool DecodePageState(const std::string& encoded, ExplodedPageState* exploded) {
   return !obj.parse_error;
 }
 
-bool EncodePageState(const ExplodedPageState& exploded, std::string* encoded) {
+void EncodePageState(const ExplodedPageState& exploded, std::string* encoded) {
   SerializeObject obj;
   obj.version = kCurrentVersion;
   WritePageState(exploded, &obj);
   *encoded = obj.GetAsString();
-  return true;
 }
 
 #if defined(OS_ANDROID)