Use int64 time stamp when storing metadata to the HTTP cache.

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index 3274fb49d9e6324f9a215761b9145cac1950be93..690bfe9d75baec9c301b74a63017375097bcdfe6 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -968,6 +968,9 @@ void WebURLLoaderImpl::PopulateURLResponse(const GURL& url,
                                            WebURLResponse* response) {
   response->setURL(url);
   response->setResponseTime(info.response_time.ToDoubleT());
+  // FIXME: remove static cast once setResponseTime is no longer overloaded.
+  response->setResponseTime(
+      static_cast<long long>(info.response_time.ToInternalValue()));
   response->setMIMEType(WebString::fromUTF8(info.mime_type));
   response->setTextEncodingName(WebString::fromUTF8(info.charset));
   response->setExpectedContentLength(info.content_length);