Keep NaCl plugins used in app background pages alive when active.

components/nacl/browser/nacl_browser_delegate.h

Index: components/nacl/browser/nacl_browser_delegate.h
diff --git a/components/nacl/common/nacl_browser_delegate.h b/components/nacl/browser/nacl_browser_delegate.h
similarity index 86%
rename from components/nacl/common/nacl_browser_delegate.h
rename to components/nacl/browser/nacl_browser_delegate.h
index 10d014801566d3df2359a68982f189a40cbb9771..08e82df6db49b58932520b6bea9d013917cb5325 100644
--- a/components/nacl/common/nacl_browser_delegate.h
+++ b/components/nacl/browser/nacl_browser_delegate.h
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_NACL_COMMON_NACL_BROWSER_DELEGATE_H_
-#define COMPONENTS_NACL_COMMON_NACL_BROWSER_DELEGATE_H_
+#ifndef COMPONENTS_NACL_BROWSER_NACL_BROWSER_DELEGATE_H_
+#define COMPONENTS_NACL_BROWSER_NACL_BROWSER_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
+// Include because nested OnIdleChangeCallback class can't be forward declared.
+#include "content/public/browser/browser_ppapi_host.h"
 
 class GURL;
 
@@ -21,10 +23,6 @@ class HostFactory;
 }
 }
 
-namespace content {
-class BrowserPpapiHost;
-}
-
 // Encapsulates the dependencies of NaCl code on chrome/, to avoid a direct
 // dependency on chrome/.
 class NaClBrowserDelegate {
@@ -73,6 +71,10 @@ class NaClBrowserDelegate {
 
   // Returns whether NaCl application with this manifest URL should be debugged.
   virtual bool URLMatchesDebugPatterns(const GURL& manifest_url) = 0;
+
+  // Returns a callback that handles NaCl idle state transitions.
+  virtual const content::BrowserPpapiHost::OnIdleChangeCallback

[yzshen1, 2013/11/21 18:01:50]

Why do we need 'const' here?

[scheib, 2013/12/11 21:35:40]

Done.

+      GetOnIdleChangeCallback() = 0;
 };
 
-#endif  // COMPONENTS_NACL_COMMON_NACL_BROWSER_DELEGATE_H_
+#endif  // COMPONENTS_NACL_BROWSER_NACL_BROWSER_DELEGATE_H_