Expose privacy-relevant preferences via Chrome's extension API.

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "unprivileged": true,
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
@@ skipping 5980 matching lines @@
           },
           "referrersEnabled": {
             "$ref": "ChromeSetting",
             "value": ["referrersEnabled", {"type":"boolean"}],
             "description": "Whether referrers should be enabled. The value of this preference is of type boolean, and the default value is true."
           },
           "hyperlinkAuditingEnabled": {
             "$ref": "ChromeSetting",
             "value": ["hyperlinkAuditingEnabled", {"type":"boolean"}],
             "description": "Whether to enable hyperlink auditing (\"<a ping>\"). The value of this preference is of type boolean, and the default value is true."
+          },
+
+          "alternateErrorPagesEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["alternateErrorPagesEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "autofillEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["autofillEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "clearSiteDataOnExit": {
+            "$ref": "ChromeSetting",
+            "value": ["clearSiteDataOnExit", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>false</code>."
+          },
+          "instantEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["instantEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "metricsReportingEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["metricsReportingEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "networkPredictionEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["networkPredictionEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "searchSuggestEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["searchSuggestEnabled", {"type":"boolean"}],
+            "description": "If enabled, Chrome sends the text you type into the Omnibox to your default search engine, which provides predictions of websites and searches that are likely completions of what you've typed so far. This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "safeBrowsingEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["safeBrowsingEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
+          },
+          "translateEnabled": {
+            "$ref": "ChromeSetting",
+            "value": ["translateEnabled", {"type":"boolean"}],
+            "description": "This preference's value is a boolean, defaulting to <code>true</code>."
           }
         }
       },
       "cookies": {
         "$ref": "ContentSetting",
         "description": "Whether to allow cookies and other local data to be set by websites. One of<br><var>allow</var>: Accept cookies,<br><var>block</var>: Block cookies,<br><var>session_only</var>: Accept cookies only for the current session. Default is <var>allow</var>.<br>The primary URL is the URL representing the cookie origin. The secondary URL is the URL of the top-level frame.",
         "value": [
           "cookies",
           {"type":"string", "enum": ["allow", "block", "session_only"]}
         ]
@@ skipping 262 matching lines @@
             "type": "function",
             "name": "callback",
             "optional": true,
             "description": "A callback when the function is complete. Any errors will be reported in <a href='extension.html#property-lastError'>chrome.extension.lastError</a>."
           }
         ]
       }
     ]
   }
 ]