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

chrome/browser/extensions/app_background_page_apitest.cc

Index: chrome/browser/extensions/app_background_page_apitest.cc
diff --git a/chrome/browser/extensions/app_background_page_apitest.cc b/chrome/browser/extensions/app_background_page_apitest.cc
index c423a8c7cd097f62ef884de80031973aa4c7c135..b10fac403fad1457489c68bcf163cff969e76da6 100644
--- a/chrome/browser/extensions/app_background_page_apitest.cc
+++ b/chrome/browser/extensions/app_background_page_apitest.cc
@@ -20,6 +20,7 @@
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "components/nacl/browser/nacl_process_host.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_notification_tracker.h"
 #include "content/public/test/test_utils.h"
@@ -27,7 +28,6 @@
 #include "extensions/common/switches.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
-#include "ppapi/shared_impl/ppapi_switches.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
@@ -131,8 +131,7 @@ class AppBackgroundPageNaClTest : public AppBackgroundPageApiTest {
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     AppBackgroundPageApiTest::SetUpCommandLine(command_line);
-    command_line->AppendSwitchASCII(
-        switches::kPpapiKeepAliveThrottle, "50");
+    nacl::NaClProcessHost::SetPpapiKeepAliveThrottleForTesting(50);
     command_line->AppendSwitchASCII(
         extensions::switches::kEventPageIdleTime, "1000");
     command_line->AppendSwitchASCII(