[DOMStorage] Rate limiting writes to disk.

base/time/time.h

Index: base/time/time.h
diff --git a/base/time/time.h b/base/time/time.h
index 18de085e341714b85efe6e10a988835601bf998e..6d618614aef3ed7574f3f279c37805356d935067 100644
--- a/base/time/time.h
+++ b/base/time/time.h
@@ -178,6 +178,14 @@ class BASE_EXPORT TimeDelta {
     return delta_ / a.delta_;
   }
 
+  // Multiplicative computations with floats.
+  TimeDelta multiply_by(double a) const {

[rvargas (doing something else), 2015/02/20 21:49:42]

I know that in general we prefer named methods over overloading, but all
operations are currently performed with operator overloading so it seems better
to be consistent with what this class is doing.

[michaeln, 2015/02/20 22:18:04]

i initially tried it with operators but adding an operator*(dbl) makes usages
with literal numeric values ambiguous

[rvargas (doing something else), 2015/02/20 22:44:56]

hmmm, how about 
  template<typename T>
  TimeDelta operator*(T a) const {
    return TimeDelta(delta_ * a);
  }

It extends the allowed types, but in practice we are saying that we are ok with
things that the compiler can multiply with delta_, no?

+    return TimeDelta(delta_ * a);
+  }
+  TimeDelta divide_by(double a) const {
+    return TimeDelta(delta_ / a);
+  }
+
   // Defined below because it depends on the definition of the other classes.
   Time operator+(Time t) const;
   TimeTicks operator+(TimeTicks t) const;