Bug 1004923 part 4 - Add some early returns to PRMJ_Now. r=njn

js/src/prmjtime.cpp

@@ -351,9 +351,9 @@ PRMJ_Now()
                     // behavior for this call. It's possible that in the
                     // future, the user will want the high resolution timer, so
                     // we don't disable it entirely.
-                    returnedTime = int64_t(lowresTime);
-                    needsCalibration = false;
-                } else {
+                    return int64_t(lowresTime);
+                }
+
                 // It is possible that when we recalibrate, we will return a
                 // value less than what we have returned before; this is
                 // unavoidable. We cannot tell the different between a
@@ -364,11 +364,9 @@ PRMJ_Now()
                 // decreases; the old implementation has this behavior as
                 // well.
                 needsCalibration = true;
-                }
             } else {
                 // No detectable clock skew.
-                returnedTime = int64_t(highresTime);
-                needsCalibration = false;
+                return int64_t(highresTime);
             }
         } else {
             // No high resolution timer is available, so fall back.