Fix error handling in analysis.getError.

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 11f90e2b7b7e71eec60a4aec0126780804e61f13..1fcbcb95325dd2d50b26febe00f537bc206558ce 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -274,6 +274,13 @@
           should use the information provided by the 'analysis.errors'
           notification.
         </p>
+        <p>
+          If a request is made for a file which does not exist, or
+          which 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
+          GET_ERRORS_INVALID_FILE will be generated.
+        </p>
         <params>
           <field name="file">
             <ref>FilePath</ref>
@@ -2586,17 +2593,12 @@
         </p>
         <enum>
           <value>
-            <code>GET_ERRORS_ERROR</code>
-            <p>
-              An error occurred during the processing of an
-              "analysis.getErrors" request.
-            </p>
+            <code>GET_ERRORS_INVALID_FILE</code>
             <p>
-              This is a legacy error; it will be removed before the
-              API reaches version 1.0.
+              An "analysis.getErrors" request specified a FilePath
+              which does not match a file currently subject to
+              analysis.
             </p>
-            <!-- TODO(paulberry): remove this error and the code that
-                 generates it. -->
           </value>
           <value>
             <code>INVALID_PARAMETER</code>