Added method to convert base::Time to a Java timestamp.

BUG=247382

Review URL: https://chromiumcodereview.appspot.com/22791013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224744 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 17 insertions, 0 deletions

diff --git a/base/time/time.cc b/base/time/time.cc
index ce25dea..a9e4b1c 100644
--- a/base/time/time.cc
+++ b/base/time/time.cc
@@ -138,6 +138,19 @@ double Time::ToJsTime() const {
           kMicrosecondsPerMillisecond);
 }
 
+int64 Time::ToJavaTime() const {
+  if (is_null()) {
+    // Preserve 0 so the invalid result doesn't depend on the platform.
+    return 0;
+  }
+  if (is_max()) {
+    // Preserve max without offset to prevent overflow.
+    return std::numeric_limits<int64>::max();
+  }
+  return ((us_ - kTimeTToMicrosecondsOffset) /
+          kMicrosecondsPerMillisecond);
+}
+
 // static
 Time Time::UnixEpoch() {
   Time time;
diff --git a/base/time/time.h b/base/time/time.h
index 5d7033a..a236a3f 100644
--- a/base/time/time.h
+++ b/base/time/time.h
@@ -300,6 +300,10 @@ class BASE_EXPORT Time {
   static Time FromJsTime(double ms_since_epoch);
   double ToJsTime() const;
 
+  // Converts to Java convention for times, a number of
+  // milliseconds since the epoch.
+  int64 ToJavaTime() const;
+
 #if defined(OS_POSIX)
   static Time FromTimeVal(struct timeval t);
   struct timeval ToTimeVal() const;