Replace --ppapi-keep-alive-throttle command line switch with IPC parameter.

Part of a broad effort to reduce the number of command line switches.

BUG=350510

Review URL: https://codereview.chromium.org/191633002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256436 0039d316-1c4b-4281-b951-d872f2087c98

6 files changed, 37 insertions, 5 deletions

diff --git a/ppapi/shared_impl/ppapi_constants.cc b/ppapi/shared_impl/ppapi_constants.cc
new file mode 100644
index 0000000..6962513
--- /dev/null
+++ b/ppapi/shared_impl/ppapi_constants.cc
@@ -0,0 +1,11 @@
+// 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 "ppapi/shared_impl/ppapi_constants.h"
+
+namespace ppapi {
+
+const unsigned kKeepaliveThrottleIntervalDefaultMilliseconds = 5000;
+
+}  // namespace ppapi
diff --git a/ppapi/shared_impl/ppapi_constants.h b/ppapi/shared_impl/ppapi_constants.h
new file mode 100644
index 0000000..9faf18d
--- /dev/null
+++ b/ppapi/shared_impl/ppapi_constants.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef PPAPI_SHARED_IMPL_PPAPI_CONSTANTS_H_
+#define PPAPI_SHARED_IMPL_PPAPI_CONSTANTS_H_
+
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+// Default interval to space out IPC messages sent indicating that a plugin is
+// active and should be kept alive. The value must be smaller than any threshold
+// used to kill inactive plugins by the embedder host.
+PPAPI_SHARED_EXPORT extern const unsigned
+    kKeepaliveThrottleIntervalDefaultMilliseconds;
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_PPAPI_CONSTANTS_H_
diff --git a/ppapi/shared_impl/ppapi_nacl_plugin_args.cc b/ppapi/shared_impl/ppapi_nacl_plugin_args.cc
index 92df690..4dd5110 100644
--- a/ppapi/shared_impl/ppapi_nacl_plugin_args.cc
+++ b/ppapi/shared_impl/ppapi_nacl_plugin_args.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ppapi/shared_impl/ppapi_constants.h"
 #include "ppapi/shared_impl/ppapi_nacl_plugin_args.h"
 
 namespace ppapi {
@@ -9,7 +10,10 @@ namespace ppapi {
 // We must provide explicit definitions of these functions for builds on
 // Windows.
 PpapiNaClPluginArgs::PpapiNaClPluginArgs()
-    : off_the_record(false), supports_dev_channel(false) {}
+    : off_the_record(false),
+      supports_dev_channel(false),
+      keepalive_throttle_interval_milliseconds(
+          kKeepaliveThrottleIntervalDefaultMilliseconds) {}
 
 PpapiNaClPluginArgs::~PpapiNaClPluginArgs() {}
 
diff --git a/ppapi/shared_impl/ppapi_nacl_plugin_args.h b/ppapi/shared_impl/ppapi_nacl_plugin_args.h
index 2f18c8e..993131d 100644
--- a/ppapi/shared_impl/ppapi_nacl_plugin_args.h
+++ b/ppapi/shared_impl/ppapi_nacl_plugin_args.h
@@ -20,6 +20,7 @@ struct PPAPI_SHARED_EXPORT PpapiNaClPluginArgs {
   bool off_the_record;
   PpapiPermissions permissions;
   bool supports_dev_channel;
+  unsigned keepalive_throttle_interval_milliseconds;
 
   // Switches from the command-line.
   std::vector<std::string> switch_names;
diff --git a/ppapi/shared_impl/ppapi_switches.cc b/ppapi/shared_impl/ppapi_switches.cc
index 2a3f1c28..84ba250 100644
--- a/ppapi/shared_impl/ppapi_switches.cc
+++ b/ppapi/shared_impl/ppapi_switches.cc
@@ -9,7 +9,4 @@ namespace switches {
 // Enables the testing interface for PPAPI.
 const char kEnablePepperTesting[] = "enable-pepper-testing";
 
-// Specifies throttling time in milliseconds for PpapiHostMsg_Keepalive IPCs.
-const char kPpapiKeepAliveThrottle[] = "ppapi-keep-alive-throttle";
-
 }  // namespace switches
diff --git a/ppapi/shared_impl/ppapi_switches.h b/ppapi/shared_impl/ppapi_switches.h
index 4fb9c3481..a5c8e9d 100644
--- a/ppapi/shared_impl/ppapi_switches.h
+++ b/ppapi/shared_impl/ppapi_switches.h
@@ -10,7 +10,6 @@
 namespace switches {
 
 PPAPI_SHARED_EXPORT extern const char kEnablePepperTesting[];
-PPAPI_SHARED_EXPORT extern const char kPpapiKeepAliveThrottle[];
 
 }  // namespace switches