Enable incognito_session_only preferences

chrome/common/extensions/docs/preferences.html

Index: chrome/common/extensions/docs/preferences.html
diff --git a/chrome/common/extensions/docs/preferences.html b/chrome/common/extensions/docs/preferences.html
index bfd2ec666f9dcec3231c8a99b086c952b7d1ac88..1f72de516a40faab121044968e71b64aa54c7ba4 100644
--- a/chrome/common/extensions/docs/preferences.html
+++ b/chrome/common/extensions/docs/preferences.html
@@ -715,7 +715,7 @@ considering the preference rules. It is used by Chrome.
                           array of <span><span></span></span>
                         </span>
                         <span>string</span>
-                        <span>["regular", "incognito_persistent"]</span>
+                        <span>["regular", "incognito_persistent", "incognito_session_only"]</span>
                       </span>
                     </span>
                   )
@@ -726,7 +726,7 @@ considering the preference rules. It is used by Chrome.
           <dd class="todo" style="display: none; ">
             Undocumented.
           </dd>
-          <dd>Where to set the preference (default: regular). 'regular' = preference for regular profile (which is inherited by the incognito profile if not overridden elsewhere), 'incognito_persistent' = preference for incognito profile that sustains browser restarts (overrides regular preferences).</dd>
+          <dd>Where to set the preference (default: regular). One of<br><var>'regular'</var>: preference for regular profile (which is inherited by the incognito profile if not overridden elsewhere),<br><var>incognito_persistent</var>: preference for incognito profile that sustains browser restarts (overrides regular preferences),<br><var>incognito_session_only</var>: preference for incognito profile that can only be set during an incognito session and is deleted when the incognito session ends (overrides regular and incognito_persistent' preferences).</dd>
           <dd style="display: none; ">
             This parameter was added in version
             <b><span></span></b>.
@@ -1577,7 +1577,7 @@ considering the preference rules. It is used by Chrome.
                           array of <span><span></span></span>
                         </span>
                         <span>string</span>
-                        <span>["regular", "incognito_persistent"]</span>
+                        <span>["regular", "incognito_persistent", "incognito_session_only"]</span>
                       </span>
                     </span>
                   )
@@ -1588,7 +1588,7 @@ considering the preference rules. It is used by Chrome.
           <dd class="todo" style="display: none; ">
             Undocumented.
           </dd>
-          <dd>Where to set the preference (default: regular). 'regular' = preference for regular profile (which is inherited by the incognito profile if not overridden elsewhere), 'incognito_persistent' = preference for incognito profile that sustains browser restarts (overrides regular preferences).</dd>
+          <dd>Where to set the preference (default: regular). One of <br><var>regular</var>: preference for regular profile (which is inherited by the incognito profile if not overridden elsewhere), 'incognito_persistent' = preference for incognito profile that sustains browser restarts (overrides regular preferences).</dd>
           <dd style="display: none; ">
             This parameter was added in version
             <b><span></span></b>.