Fix HidService lifetime issues.

chrome/browser/extensions/api/chrome_extensions_api_client.h

Index: chrome/browser/extensions/api/chrome_extensions_api_client.h
diff --git a/chrome/browser/extensions/api/chrome_extensions_api_client.h b/chrome/browser/extensions/api/chrome_extensions_api_client.h
index 0bbffb1ee06c37288b12590e72bb1c321cfb7845..80988735c9865a596c7a353cdf6d1d0667b5e3ab 100644
--- a/chrome/browser/extensions/api/chrome_extensions_api_client.h
+++ b/chrome/browser/extensions/api/chrome_extensions_api_client.h
@@ -6,7 +6,6 @@
 #define CHROME_BROWSER_EXTENSIONS_API_CHROME_EXTENSIONS_API_CLIENT_H_
 
 #include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
 #include "extensions/browser/api/extensions_api_client.h"
 
 namespace extensions {
@@ -33,12 +32,9 @@ class ChromeExtensionsAPIClient : public ExtensionsAPIClient {
       content::BrowserContext* browser_context,
       int guest_instance_id,
       const std::string& guest_extension_id) OVERRIDE;
-  virtual device::HidService* GetHidService() OVERRIDE;
   virtual void RegisterGuestViewTypes() OVERRIDE;
 
  private:
-  scoped_ptr<device::HidService> hid_service_;
-
   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsAPIClient);
 };