Extension API: Rename contentSettings.misc to .global and rename preferences under it.

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 5455 matching lines @@
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   },
   {
-    "namespace": "experimental.contentSettings.misc",
+    "namespace": "experimental.contentSettings.global",
     "properties": {
-      "blockThirdPartyCookies": {
+      "thirdPartyCookiesAllowed": {
         "$ref": "Preference",
-        "value": ["blockThirdPartyCookies", {"type": "boolean"}],
-        "description": "Whether third party cookies should be blocked. The value of this preference is of type boolean."
+        "value": ["thirdPartyCookiesAllowed", {"type": "boolean"}],
+        "description": "Whether third party cookies should be allowed. The value of this preference is of type boolean, and the default value is true."
       },
-      "enableReferrers": {
+      "referrersEnabled": {
         "$ref": "Preference",
-        "value": ["enableReferrers", {"type":"boolean"}],
-        "description": "Whether referrers should be enabled. The value of this preference is of type boolean."
+        "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."
       },
-      "enableHyperlinkAuditing": {
+      "hyperlinkAuditingEnabled": {
         "$ref": "Preference",
-        "value": ["enableHyperlinkAuditing", {"type":"boolean"}],
-        "description": "Whether to enable hyperlink auditing (\"<a ping>\"). The value of this preference is of type boolean."
+        "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."
       }
     }
   },
   {
     "namespace": "experimental.debugger",
     "functions": [
       {
         "name": "attach",
         "type": "function",
         "description": "Attaches debugger to the tab with given id.",
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           {
             "type": "integer",
             "name": "tabId",
             "description": "The id of the tab that was detached."
           }
         ]
       }
     ]
   }
 ]