Test Keeping NaCl plugins used in app background pages alive when active.

extensions/browser/process_manager.cc

Index: extensions/browser/process_manager.cc
diff --git a/extensions/browser/process_manager.cc b/extensions/browser/process_manager.cc
index 7a362e329a387c7b90e8b3776fc65accb7e26723..070cbd78d4c6d957f5c0d3b326709009450b6ce5 100644
--- a/extensions/browser/process_manager.cc
+++ b/extensions/browser/process_manager.cc
@@ -442,6 +442,11 @@ void ProcessManager::KeepaliveImpulse(const Extension* extension) {
       IncrementLazyKeepaliveCount(extension);
     }
   }
+
+  if (!keepalive_impulse_callback_for_testing_.is_null()) {
+    if (keepalive_impulse_callback_for_testing_.Run(extension->id()))
+      keepalive_impulse_callback_for_testing_ = ImpulseCallbackForTesting();
+  }
 }
 
 // DecrementLazyKeepaliveCount is called when no calls to KeepaliveImpulse
@@ -454,8 +459,14 @@ void ProcessManager::OnKeepaliveImpulseCheck() {
   for (BackgroundPageDataMap::iterator i = background_page_data_.begin();
        i != background_page_data_.end();
        ++i) {
-    if (i->second.previous_keepalive_impulse && !i->second.keepalive_impulse)
+    if (i->second.previous_keepalive_impulse && !i->second.keepalive_impulse) {
       DecrementLazyKeepaliveCount(i->first);
+      if (!keepalive_impulse_decrement_callback_for_testing_.is_null()) {
+        if (keepalive_impulse_decrement_callback_for_testing_.Run(i->first))
+          keepalive_impulse_decrement_callback_for_testing_ =
+              ImpulseCallbackForTesting();
+      }
+    }
 
     i->second.previous_keepalive_impulse = i->second.keepalive_impulse;
     i->second.keepalive_impulse = false;
@@ -576,6 +587,16 @@ content::BrowserContext* ProcessManager::GetBrowserContext() const {
   return site_instance_->GetBrowserContext();
 }
 
+void ProcessManager::SetKeepaliveImpulseCallbackForTesting(
+    const ImpulseCallbackForTesting& callback) {
+  keepalive_impulse_callback_for_testing_ = callback;
+}
+
+void ProcessManager::SetKeepaliveImpulseDecrementCallbackForTesting(
+    const ImpulseCallbackForTesting& callback) {
+  keepalive_impulse_decrement_callback_for_testing_ = callback;
+}
+
 void ProcessManager::Observe(int type,
                              const content::NotificationSource& source,
                              const content::NotificationDetails& details) {