Increase device orientation event frequency to 60 Hz. Change constants

content/renderer/device_sensors/device_light_event_pump.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/device_sensors/device_light_event_pump.h"
 
+#include "base/basictypes.h"
+#include "base/time/time.h"
 #include "content/common/device_sensors/device_light_messages.h"
 #include "content/public/renderer/render_thread.h"
 #include "third_party/WebKit/public/platform/WebDeviceLightListener.h"
 
 namespace {
-// Default delay between subsequent firing of DeviceLight events.
-const int kDefaultLightPumpDelayMillis = 200;
+// Default rate for firing of DeviceLight events.
+const int kDefaultLightPumpFrequencyHz = 5;
+const int kDefaultLightPumpDelayMicroseconds =
+    base::Time::kMicrosecondsPerSecond / kDefaultLightPumpFrequencyHz;
 }  // namespace
 
 namespace content {
 
 DeviceLightEventPump::DeviceLightEventPump(RenderThread* thread)
     : DeviceSensorEventPump<blink::WebDeviceLightListener>(thread),
       last_seen_data_(-1) {
-  pump_delay_millis_ = kDefaultLightPumpDelayMillis;
+  pump_delay_microseconds_ = kDefaultLightPumpDelayMicroseconds;
 }
 
 DeviceLightEventPump::~DeviceLightEventPump() {
 }
 
 bool DeviceLightEventPump::OnControlMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(DeviceLightEventPump, message)
     IPC_MESSAGE_HANDLER(DeviceLightMsg_DidStartPolling, OnDidStart)
@@ skipping 38 matching lines @@
   RenderThread::Get()->Send(new DeviceLightHostMsg_StopPolling());
 }
 
 void DeviceLightEventPump::SendFakeDataForTesting(void* fake_data) {
   double data = *static_cast<double*>(fake_data);
 
   listener()->didChangeDeviceLight(data);
 }
 
 }  // namespace content