From 42132be3f9f8aadc2de3f8c29ece41e19a4f6281 Mon Sep 17 00:00:00 2001
From: "jyasskin@chromium.org"
 <jyasskin@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Fri, 8 Jun 2012 22:59:33 +0000
Subject: Add Javascript time methods to base::Time.

Review URL: https://chromiumcodereview.appspot.com/10536061

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@141317 0039d316-1c4b-4281-b951-d872f2087c98
---
 base/time.cc | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'base/time.cc')

diff --git a/base/time.cc b/base/time.cc
index 39a8b56..f04ebbc 100644
--- a/base/time.cc
+++ b/base/time.cc
@@ -93,6 +93,23 @@ double Time::ToDoubleT() const {
 }
 
 // static
+Time Time::FromJsTime(double ms_since_epoch) {
+  // The epoch is a valid time, so this constructor doesn't interpret
+  // 0 as the null time.
+  return Time(static_cast<int64>(ms_since_epoch * kMicrosecondsPerMillisecond) +
+              kTimeTToMicrosecondsOffset);
+}
+
+double Time::ToJsTime() const {
+  if (us_ == 0) {
+    // Preserve 0 so the invalid result doesn't depend on the platform.
+    return 0;
+  }
+  return (static_cast<double>(us_ - kTimeTToMicrosecondsOffset) /
+          kMicrosecondsPerMillisecond);
+}
+
+// static
 Time Time::UnixEpoch() {
   Time time;
   time.us_ = kTimeTToMicrosecondsOffset;
-- 
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