Remove keep-alive impulse IPCs from NaCl modules.

ppapi/proxy/ppapi_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message header, no traditional include guard.
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
@@ skipping 456 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(display_name)
   IPC_STRUCT_TRAITS_MEMBER(mtu)
 IPC_STRUCT_TRAITS_END()
 
 // Only whitelisted switches passed through PpapiNaClPluginArgs.
 // The list of switches can be found in:
 //   components/nacl/browser/nacl_process_host.cc
 IPC_STRUCT_TRAITS_BEGIN(ppapi::PpapiNaClPluginArgs)
   IPC_STRUCT_TRAITS_MEMBER(off_the_record)
   IPC_STRUCT_TRAITS_MEMBER(permissions)
-  IPC_STRUCT_TRAITS_MEMBER(keepalive_throttle_interval_milliseconds)
   IPC_STRUCT_TRAITS_MEMBER(switch_names)
   IPC_STRUCT_TRAITS_MEMBER(switch_values)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(PP_AudioProfileDescription)
   IPC_STRUCT_TRAITS_MEMBER(profile)
   IPC_STRUCT_TRAITS_MEMBER(max_channels)
   IPC_STRUCT_TRAITS_MEMBER(sample_size)
   IPC_STRUCT_TRAITS_MEMBER(sample_rate)
   IPC_STRUCT_TRAITS_MEMBER(hardware_accelerated)
@@ skipping 468 matching lines @@
 // linker to link the given object files together to produce a nexe
 // file, writing the output to the given file handle.
 IPC_SYNC_MESSAGE_CONTROL2_1(PpapiMsg_PnaclTranslatorLink,
                             /* object file FDs for inputs */
                             std::vector<ppapi::proxy::SerializedHandle>,
                             /* nexe file FD for output */
                             ppapi::proxy::SerializedHandle,
                             /* success status result */
                             bool)
 
-// Reports to the browser that a plugin has been active.
-IPC_MESSAGE_CONTROL0(PpapiHostMsg_Keepalive)
 
-// -----------------------------------------------------------------------------
 // These are from the plugin to the renderer.
 
 // Reply to PpapiMsg_CreateChannel. The handle will be NULL if the channel
 // could not be established. This could be because the IPC could not be created
 // for some weird reason, but more likely that the plugin failed to load or
 // initialize properly.
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_ChannelCreated,
                      IPC::ChannelHandle /* handle */)
 
 // Notify the renderer that the PPAPI channel gets ready in the plugin.
@@ skipping 1550 matching lines @@
                      uint32_t /* status */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_VideoCapture_OnError,
                      uint32_t /* error */)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_VideoCapture_OnBufferReady,
                      uint32_t /* buffer */)
 
 // Sent by the PPAPI process to indicate that a field trial has been activated.
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_FieldTrialActivated, std::string /* name */)
 
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)