Add native file picker impl using SelectFileDialog.

chrome/browser/intents/native_services.h

 // Copyright (c) 2012 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 CHROME_BROWSER_INTENTS_NATIVE_SERVICES_H_
 #define CHROME_BROWSER_INTENTS_NATIVE_SERVICES_H_
 
 #include <string>
 #include <vector>
 #include "base/string16.h"
 
 class GURL;
 
 namespace content {
+class WebContents;
 class WebIntentsDispatcher;
 }
 
 namespace webkit_glue {
  struct WebIntentData;
  struct WebIntentServiceData;
 }
 
 namespace web_intents {
 
 class IntentServiceHost;
 
 extern const char kChromeNativeSerivceScheme[];
 extern const char kNativeFilePickerUrl[];
 
 typedef std::vector<webkit_glue::WebIntentServiceData> IntentServiceList;
 
-#if defined(TOOLKIT_VIEWS)
+#if !defined(ANDROID)
 // Factory capable of producing a file picker NativeService.
 class FilePickerFactory {
  public:
   // Returns a localized title for the file picker.
   static string16 GetServiceTitle();
 
   // Returns a new instance of FilePickerService.
   static IntentServiceHost* CreateServiceInstance(
-      const webkit_glue::WebIntentData& intent);
+      const webkit_glue::WebIntentData& intent,
+      content::WebContents* web_contents);
+
   DISALLOW_COPY_AND_ASSIGN(FilePickerFactory);
 };
 #endif
 
 class NativeServiceRegistry {
  public:
   NativeServiceRegistry();
   // Populates |services| with all supported native services.
   void GetSupportedServices(
       const string16& action,
       IntentServiceList* services);
+
   DISALLOW_COPY_AND_ASSIGN(NativeServiceRegistry);
 };
 
 class NativeServiceFactory {
  public:
   NativeServiceFactory();
-  // Returns a NativeService instance suitable to handle
-  // |intent|.
+  // Returns a NativeService instance suitable to handle |intent|.
+  // |url| identifies the service to be instantiated, and |web_contents|
+  // is the web_contents that may be be needed to serve as host environment
+  // to the service.
   IntentServiceHost* CreateServiceInstance(
       const GURL& url,
-      const webkit_glue::WebIntentData& intent);
+      const webkit_glue::WebIntentData& intent,
+      content::WebContents* web_contents);
+
   DISALLOW_COPY_AND_ASSIGN(NativeServiceFactory);
 };
 
 }  // web_intents namespaces
 
 #endif  // CHROME_BROWSER_INTENTS_NATIVE_SERVICES_H_