Adding <keygen> Content Setting (Android UI)

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index 84b49fe91aeff615c0d250025ae5ccccebedf14f..54dd403dd122a317643ae18c18c8369eea53f7d2 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -496,6 +496,9 @@ Usage statistics include information such as preferences, button clicks, and mem
       <message name="IDS_JAVASCRIPT_PERMISSION_TITLE" desc="Title of the permission to run javascript [CHAR-LIMIT=32]">
         JavaScript
       </message>
+      <message name="IDS_KEYGEN_PERMISSION_TITLE" desc="Title of the permission to run key generation in a form [CHAR-LIMIT=32]">

[Finnur, 2015/11/11 10:25:45]

I don't think this is enough context for a translator to figure out how to
translate this into other languages.

[svaldez, 2015/11/19 17:50:25]

Acknowledged.

+        Key Generation

[Finnur, 2015/11/11 10:25:45]

I'd run this wording by Rebecca as well as the image. I suspect users will find
it a bit cryptic.

[svaldez, 2015/11/19 17:50:25]

I think the plan is to ping UI folks to check over the strings/images for both
this CL and the non-Android UI CL.

+      </message>
       <message name="IDS_POPUP_PERMISSION_TITLE" desc="Title of the permission to display pop-up windows [CHAR-LIMIT=32]">
         Pop-ups
       </message>