Changed host and NPAPI extension permission strings (access -> read and modify), updated unit tests

chrome/common/extensions/docs/templates/articles/permission_warnings.html

 <h1>Permission Warnings</h1>
 
 
 <!--
 NOTE: When this doc is updated, the online help should also be updated:
 http://www.google.com/support/chrome_webstore/bin/answer.py?hl=en&answer=186213
 
 We should periodically look at
 http://src.chromium.org/viewvc/chrome/trunk/src/chrome/app/generated_resources.grd?view=markup
 to make sure that we're covering all messages. Search for
@@ skipping 125 matching lines @@
 <p>
 <table>
   <tr>
     <th> Warning message </th>
     <th> Manifest entry that caused it </th>
     <th> Notes </th>
   </tr>
 <tr>
   <td style="font-weight:bold">
     <!-- IDS_EXTENSION_PROMPT_WARNING_FULL_ACCESS -->
-    Access all data on your computer and the websites you visit
+    Read and modify all your data on your computer and the websites you visit
   </td>
   <td>
     "plugins"
   </td>
   <td>
     The "plugins" permission is required by
     <a href="npapi.html">NPAPI plugins</a>.
   </td>
 </tr>
 
@@ skipping 75 matching lines @@
     <p>
       The "contentSettings" permission is required by
       <a href="contentSettings.html"><code>chrome.contentSettings</code></a>.
     </p>
   </td>
 </tr>
 
 <tr>
   <td style="font-weight:bold">
     <!-- IDS_EXTENSION_PROMPT_WARNING_ALL_HOSTS -->
-    Access your data on all websites
+    Read and modify your data on all websites
   </td>
   <td>
     <!-- HasEffectiveAccessToAllHosts() -->
     Any of the following:
     <ul>
       <li> "debugger" permission </li>
       <li> "pageCapture" permission </li>
       <li> "proxy" permission </li>
       <li> A match pattern in the "permissions" field
         that matches all hosts </li>
@@ skipping 22 matching lines @@
       <li> <code>*://*/*</code> </li>
       <li> <code>&lt;all_urls&gt;</code> </li>
     </ul>
     <strong>Note that you may be able to avoid declaring all host permissions using the <code><a href="activeTab.html">activeTab</a></code> permission.</strong>
   </td>
 </tr>
 <tr>
   <td style="font-weight:bold">
     <!-- IDS_EXTENSION_PROMPT_WARNING_?_HOST -->
     <!-- IDS_EXTENSION_PROMPT_WARNING_4_OR_MORE_HOSTS -->
-    Access your data on <em>{list of websites}</em>
+    Read and modify your data on <em>{list of websites}</em>
   </td>
   <td>
     A match pattern in the "permissions" field
     that specifies one or more hosts,
     but not all hosts
   </td>
   <td>
     <p>
     Up to 3 sites are listed by name.
     Subdomains aren't treated specially.
@@ skipping 167 matching lines @@
 by clicking the <b>chrome://extensions</b> page's
 <b>Update extensions now</b> button.
 </p>
 
 <h2 id="api">API</h2>
 
 <p>
 You can get a list of permission warnings for any manifest with
 $(ref:management.getPermissionWarningsByManifest).
 </p>