Add the analysis options path to the diagnostics page.

pkg/analysis_server/lib/src/context_manager.dart

Index: pkg/analysis_server/lib/src/context_manager.dart
diff --git a/pkg/analysis_server/lib/src/context_manager.dart b/pkg/analysis_server/lib/src/context_manager.dart
index 6d75ff6c1d8e63d041ae1688f7c9afd9af50ddf4..03c593699047a48d7d901fc68be86aed5900beff 100644
--- a/pkg/analysis_server/lib/src/context_manager.dart
+++ b/pkg/analysis_server/lib/src/context_manager.dart
@@ -1014,7 +1014,8 @@ class ContextManagerImpl implements ContextManager {
         String contextRoot = info.folder.path;
         ContextBuilder builder =
             callbacks.createContextBuilder(info.folder, defaultContextOptions);
-        AnalysisOptions options = builder.getAnalysisOptions(contextRoot);
+        AnalysisOptions options = builder.getAnalysisOptions(contextRoot,
+            contextRoot: driver.contextRoot);
         SourceFactory factory =
             builder.createSourceFactory(contextRoot, options);
         driver.configure(analysisOptions: options, sourceFactory: factory);
@@ -1042,7 +1043,8 @@ class ContextManagerImpl implements ContextManager {
       String contextRoot = info.folder.path;
       ContextBuilder builder =
           callbacks.createContextBuilder(info.folder, defaultContextOptions);
-      AnalysisOptions options = builder.getAnalysisOptions(contextRoot);
+      AnalysisOptions options = builder.getAnalysisOptions(contextRoot,
+          contextRoot: info.analysisDriver.contextRoot);
       SourceFactory factory = builder.createSourceFactory(contextRoot, options);
       if (enableNewAnalysisDriver) {
         AnalysisDriver driver = info.analysisDriver;