[util] Change GetMockTime to return chrono type instead of int

src/logging.cpp

@@ -203,9 +203,9 @@ std::string BCLog::Logger::LogTimestampStr(const std::string& str)
             strStamped.pop_back();
             strStamped += strprintf(".%06dZ", nTimeMicros%1000000);
         }
-        int64_t mocktime = GetMockTime();
-        if (mocktime) {
-            strStamped += " (mocktime: " + FormatISO8601DateTime(mocktime) + ")";
+        std::chrono::seconds mocktime = GetMockTime();
+        if (mocktime > 0s) {
+            strStamped += " (mocktime: " + FormatISO8601DateTime(count_seconds(mocktime)) + ")";
         }
         strStamped += ' ' + str;
     } else

src/util/time.cpp

@@ -53,9 +53,9 @@ void SetMockTime(int64_t nMockTimeIn)
     nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
 }
 
-int64_t GetMockTime()
+std::chrono::seconds GetMockTime()
 {
-    return nMockTime.load(std::memory_order_relaxed);
+    return std::chrono::seconds(nMockTime.load(std::memory_order_relaxed));
 }
 
 int64_t GetTimeMillis()

src/util/time.h

@@ -45,8 +45,9 @@ int64_t GetSystemTimeInSeconds(); // Like GetTime(), but not mockable
 
 /** For testing. Set e.g. with the setmocktime rpc, or -mocktime argument */
 void SetMockTime(int64_t nMockTimeIn);
+
 /** For testing */
-int64_t GetMockTime();
+std::chrono::seconds GetMockTime();
 
 /** Return system time (or mocked time, if set) */
 template <typename T>