Initial implementation of copy/paste support

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 78f5f4eadccba0ddb64b415ac21fe8cc640f9c31..405b7533ee8db4bcd49b9e57b7aad578f87af598 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -475,15 +475,6 @@
           libraries.
         </p>
       </field>
-      <field name="complete">
-        <ref>bool</ref>
-        <p>
-          True if all of the elements that are referenced in the specified
-          region are included in the list of elements. The list of elements will
-          be incomplete if there is an error in the specified region that
-          prevents an identifier from being resolved to a single element.
-        </p>
-      </field>
     </result>
   </request>
   <request method="getLibraryDependencies">
@@ -2083,6 +2074,12 @@
       that all of the elements in the specified list of imported elements are
       accessible within the library.
     </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 via analysis.setAnalysisRoots), an error of type
+      <tt>IMPORT_ELEMENTS_INVALID_FILE</tt> will be generated.
+    </p>
     <params>
       <field name="file">
         <ref>FilePath</ref>
@@ -2109,16 +2106,6 @@
           accessible.
         </p>
       </field>
-      <field name="complete">
-        <ref>bool</ref>
-        <p>
-          True if all of the elements that are to be made accessible would be
-          accessible if the edits were applied. The edits will not be complete,
-          for example, if one of the libraries cannot be referenced in the
-          target library or if one of the element names is already imported from
-          a different library.
-        </p>
-      </field>
     </result>
   </request>
   <request method="sortMembers">
@@ -3149,6 +3136,13 @@
         </p>
       </value>
       <value>
+        <code>IMPORT_ELEMENTS_INVALID_FILE</code>
+        <p>
+          An "edit.importElements" request specified a FilePath that does not
+          match a file currently subject to analysis.
+        </p>
+      </value>
+      <value>
         <code>INVALID_ANALYSIS_ROOT</code>
         <p>
           A path passed as an argument to a request (such as