This source file includes following definitions.
- subresource_speculation_
- Reset
- set_was_ever_connected
- set_was_used_to_convey_data
- set_subresource_speculation
- set_omnibox_speculation
- was_used_to_convey_data
- EmitPreconnectionHistograms
#include "net/socket/stream_socket.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
#include "base/values.h"
namespace net {
StreamSocket::UseHistory::UseHistory()
: was_ever_connected_(false),
was_used_to_convey_data_(false),
omnibox_speculation_(false),
subresource_speculation_(false) {
}
StreamSocket::UseHistory::~UseHistory() {
EmitPreconnectionHistograms();
}
void StreamSocket::UseHistory::Reset() {
EmitPreconnectionHistograms();
was_ever_connected_ = false;
was_used_to_convey_data_ = false;
}
void StreamSocket::UseHistory::set_was_ever_connected() {
DCHECK(!was_used_to_convey_data_);
was_ever_connected_ = true;
}
void StreamSocket::UseHistory::set_was_used_to_convey_data() {
DCHECK(was_ever_connected_);
was_used_to_convey_data_ = true;
}
void StreamSocket::UseHistory::set_subresource_speculation() {
DCHECK(was_ever_connected_);
if (was_used_to_convey_data_)
return;
subresource_speculation_ = true;
}
void StreamSocket::UseHistory::set_omnibox_speculation() {
DCHECK(was_ever_connected_);
if (was_used_to_convey_data_)
return;
omnibox_speculation_ = true;
}
bool StreamSocket::UseHistory::was_used_to_convey_data() const {
DCHECK(!was_used_to_convey_data_ || was_ever_connected_);
return was_used_to_convey_data_;
}
void StreamSocket::UseHistory::EmitPreconnectionHistograms() const {
DCHECK(!subresource_speculation_ || !omnibox_speculation_);
int result;
if (was_used_to_convey_data_)
result = 2;
else if (was_ever_connected_)
result = 1;
else
result = 0;
if (omnibox_speculation_)
result += 3;
else if (subresource_speculation_)
result += 6;
UMA_HISTOGRAM_ENUMERATION("Net.PreconnectUtilization2", result, 9);
}
}