Forward Kythe requests to plugins and merge in the results

pkg/analysis_server/tool/spec/spec_input.html

Index: pkg/analysis_server/tool/spec/spec_input.html
diff --git a/pkg/analysis_server/tool/spec/spec_input.html b/pkg/analysis_server/tool/spec/spec_input.html
index a100689712f168ad3d89f555ff0ef8c2500a7e59..19accce67e65f1ce21b983170465187647043d97 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -2541,6 +2541,12 @@
       Return the list of <tt>KytheEntry</tt> objects for some file, given the
       current state of the file system populated by "analysis.updateContent".
     </p>
+    <p>
+      If a request is made for a file that does not exist, or that is not
+      currently subject to analysis (e.g. because it is not associated with any
+      analysis root specified to analysis.setAnalysisRoots), an error of type
+      <tt>GET_KYTHE_ENTRIES_INVALID_FILE</tt> will be generated.
+    </p>
     <params>
       <field name="file">
         <ref>FilePath</ref>
@@ -3225,6 +3231,13 @@
         </p>
       </value>
       <value>
+        <code>GET_KYTHE_ENTRIES_INVALID_FILE</code>
+        <p>
+          An "analysis.getKytheEntries" request specified a FilePath that does
+          not match a file that is currently subject to analysis.
+        </p>
+      </value>
+      <value>
         <code>GET_NAVIGATION_INVALID_FILE</code>
         <p>
           An "analysis.getNavigation" request specified a FilePath