[filebrowser] Introduce View action for supported file types (e.g. pdf).

chrome/test/data/extensions/api_test/filesystem_handler/tab.js

 // 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.
 
 /*
 This extension is a file intent handler and does the following during the test:
 
 1. It first registers content hander.
 2. When content handler callback is invoked, opens tab.html page and passes
    file url via hash ref.
@@ skipping 71 matching lines @@
 function readEntryByUrl(entryUrl) {
   window.webkitResolveLocalFileSystemURL(entryUrl, onGotEntryByUrl,
                                          errorCallback);
 };
 
 // Try reading another file that has the same name as the entry we got from the
 // executed task, but .log extension instead of .tXt.
 // The .log file is created by fileBrowser component extension.
 // We should not be able to get this file's fileEntry.
 function tryOpeningLogFile(origEntry,successCallback, errorCallback) {
-  var logFilePath =origEntry.fullPath.replace('.tXt', '.log');
+  var logFilePath = origEntry.fullPath.replace('.aBc', '.log');
   origEntry.filesystem.root.getFile(logFilePath, {},
                                     successCallback,
                                     errorCallback);
 };
 
 function onLogFileOpened(file) {
   errorCallback({message: "Opened file for which we don't have permission."});
 };
 
 // Try reading content of the received file.
@@ skipping 22 matching lines @@
   }
   var entry = entries[0];
 
   // This operation should fail. If it does, we continue with testing.
   tryOpeningLogFile(entry, onLogFileOpened,
                     tryReadingReceivedFile.bind(this, entry));
 
 };
 
 function executeListener(id, details) {
-  if (id != "TextAction" && id != "BaseAction" && id != "JpegAction") {
+  if (id != "AbcAction" && id != "BaseAction" && id != "123Action") {
     chrome.test.fail("Unexpected action id: " + id);
     return;
   }
   var file_entries = details.entries;
   if (!file_entries || file_entries.length != 1) {
     chrome.test.fail("Unexpected file url list");
     return;
   }
   chrome.tabs.get(details.tab_id, function(tab) {
     if (tab.title != "file browser component test") {
       chrome.test.fail("Unexpected tab title: " + tab.title);
       return;
     }
     runFileSystemHandlerTest(file_entries);
   });
 }
 
 chrome.fileBrowserHandler.onExecute.addListener(executeListener);
 
 // This extension just initializes its chrome.fileBrowserHandler.onExecute
 // event listener, the real testing is done when this extension's handler is
 // invoked from filebrowser_component tests. This event will be raised from that
 // component extension test and it simulates user action in the file browser.
 // tab.html part of this extension can run only after the component raises this
 // event, since that operation sets the propery security context and creates
 // event's payload with proper file Entry instances. tab.html will return
 // results of its execution to filebrowser_component test through a
 // cross-component message.
 chrome.test.succeed();