rebaseline_server: allow users to generate SKP diff patches on a shared instance

gm/rebaseline_server/static/live-view.html

Index: gm/rebaseline_server/static/live-view.html
diff --git a/gm/rebaseline_server/static/live-view.html b/gm/rebaseline_server/static/live-view.html
index 44cbd0d337e1c250ad83dc5d3c8b40c0aa5ba044..6c158a6e7ec3d8b8a7c5c3373a3a70ec777b9f61 100644
--- a/gm/rebaseline_server/static/live-view.html
+++ b/gm/rebaseline_server/static/live-view.html
@@ -170,14 +170,11 @@
 
       <!-- Submission UI that we only show in the Pending Approval tab. -->
       <div ng-show="'Pending Approval' == viewingTab">
-        <div style="font-size:20px">
-          TODO(epoger): We don't yet support submitting new SKP expectations.
-        </div>
         <div style="display:inline-block">
           <button style="font-size:20px"
                   ng-click="submitApprovals(filteredImagePairs)"
-                  ng-disabled="true || submitPending || (filteredImagePairs.length == 0)">
-            Update these {{filteredImagePairs.length}} expectations on the server
+                  ng-disabled="submitPending || (filteredImagePairs.length == 0)">
+            Get a patchfile to update these {{filteredImagePairs.length}} expectations
           </button>
         </div>
         <div style="display:inline-block">
@@ -201,6 +198,12 @@
             </li>
           </ul>
         </div>
+        <div ng-show="diffResults">
+          <p>
+          Here is the patch to apply to your local checkout:
+          <br>
+          <textarea rows="8" cols="50">{{diffResults}}</textarea>

[epoger, 2014/08/20 04:50:29]

For now we display the patch within this textarea.  It would be fabulous if we
could upload this patch to Rietveld on the user's behalf.

+        </div>
       </div>
 
       <p>