Initial version of Fasta based IncrementalKernelGenerator.

pkg/front_end/lib/incremental_kernel_generator.dart

Index: pkg/front_end/lib/incremental_kernel_generator.dart
diff --git a/pkg/front_end/lib/incremental_kernel_generator.dart b/pkg/front_end/lib/incremental_kernel_generator.dart
index 3b3b429df842a2a89499bb1239af76aa1dd8f69b..a1ea76d17c99689269074c39532f8b31bcb0b3da 100644
--- a/pkg/front_end/lib/incremental_kernel_generator.dart
+++ b/pkg/front_end/lib/incremental_kernel_generator.dart
@@ -56,7 +56,7 @@ abstract class IncrementalKernelGenerator {
   /// initial set of valid sources is empty.  To obtain a kernel representation
   /// of the program, call [computeDelta].
   factory IncrementalKernelGenerator(Uri source, CompilerOptions options) =>
-      new IncrementalKernelGeneratorImpl(source, new ProcessedOptions(options));
+      new IncrementalKernelGeneratorImpl(source, options);

[Paul Berry, 2017/05/07 14:17:40]

Why are you removing ProcessedOptions?  Is there some option that isn't exposed
through its API?  If so, I would rather that we keep using ProcessedOptions and
just have it expose the option you need.

[scheglov, 2017/05/07 17:38:49]

It seemed to me initially that ProcessedOptions is too Analyzer specific.
So, I speculatively removed it.
Now, when it also has TranslateUri, it is more useful.

 
   /// Generates a kernel representation of the changes to the program, assuming
   /// that all valid sources are unchanged since the last call to
@@ -89,6 +89,8 @@ abstract class IncrementalKernelGenerator {
   /// Remove any source file(s) associated with the given file path from the set
   /// of valid sources.  This guarantees that those files will be re-read on the
   /// next call to [computeDelta]).
+  ///
+  /// TODO(scheglov) Update to use URI.
   void invalidate(String path);
 
   /// Remove all source files from the set of valid sources.  This guarantees