Remove keep-alive impulse IPCs from NaCl modules.

ppapi/proxy/plugin_globals.cc

Index: ppapi/proxy/plugin_globals.cc
diff --git a/ppapi/proxy/plugin_globals.cc b/ppapi/proxy/plugin_globals.cc
index f2ee4efa50067cc23af39f299a9c633953848a46..862031ae05323b74970ffb1f7ec4f213baa73bd8 100644
--- a/ppapi/proxy/plugin_globals.cc
+++ b/ppapi/proxy/plugin_globals.cc
@@ -64,9 +64,6 @@ PluginGlobals::PluginGlobals(
       resource_reply_thread_registrar_(
           new ResourceReplyThreadRegistrar(GetMainThreadMessageLoop())),
       udp_socket_filter_(new UDPSocketFilter()),
-      plugin_recently_active_(false),
-      keepalive_throttle_interval_milliseconds_(
-          ppapi::kKeepaliveThrottleIntervalDefaultMilliseconds),
       weak_factory_(this) {
   DCHECK(!plugin_globals_);
   plugin_globals_ = this;
@@ -88,9 +85,6 @@ PluginGlobals::PluginGlobals(
       ipc_task_runner_(ipc_task_runner),
       resource_reply_thread_registrar_(
           new ResourceReplyThreadRegistrar(GetMainThreadMessageLoop())),
-      plugin_recently_active_(false),
-      keepalive_throttle_interval_milliseconds_(
-          kKeepaliveThrottleIntervalDefaultMilliseconds),
       weak_factory_(this) {
   DCHECK(!plugin_globals_);
 }
@@ -185,22 +179,6 @@ base::TaskRunner* PluginGlobals::GetFileTaskRunner() {
   return file_thread_->task_runner().get();
 }
 
-void PluginGlobals::MarkPluginIsActive() {
-  if (!plugin_recently_active_) {
-    plugin_recently_active_ = true;
-    if (!GetBrowserSender() || !base::ThreadTaskRunnerHandle::IsSet())
-      return;
-    GetBrowserSender()->Send(new PpapiHostMsg_Keepalive());
-    DCHECK(keepalive_throttle_interval_milliseconds_);
-    GetMainThreadMessageLoop()->PostDelayedTask(
-        FROM_HERE,
-        RunWhileLocked(base::Bind(&PluginGlobals::OnReleaseKeepaliveThrottle,
-                                  weak_factory_.GetWeakPtr())),
-        base::TimeDelta::FromMilliseconds(
-            keepalive_throttle_interval_milliseconds_));
-  }
-}
-
 IPC::Sender* PluginGlobals::GetBrowserSender() {
   // CAUTION: This function is called without the ProxyLock. See also
   // InterfaceList::GetInterfaceForPPB.
@@ -251,18 +229,9 @@ void PluginGlobals::RegisterResourceMessageFilters(
   plugin_filter->AddResourceMessageFilter(udp_socket_filter_.get());
 }
 
-void PluginGlobals::set_keepalive_throttle_interval_milliseconds(unsigned i) {
-  keepalive_throttle_interval_milliseconds_ = i;
-}
-
 bool PluginGlobals::IsPluginGlobals() const {
   return true;
 }
 
-void PluginGlobals::OnReleaseKeepaliveThrottle() {
-  ppapi::ProxyLock::AssertAcquiredDebugOnly();
-  plugin_recently_active_ = false;
-}
-
 }  // namespace proxy
 }  // namespace ppapi