Remove CompilerCancelledException.

dart/pkg/dart2js_incremental/lib/caching_compiler.dart

Index: dart/pkg/dart2js_incremental/lib/caching_compiler.dart
diff --git a/dart/pkg/dart2js_incremental/lib/caching_compiler.dart b/dart/pkg/dart2js_incremental/lib/caching_compiler.dart
index 0d0a1457c064a4ecfc7694d2a6e36df2b6807eef..136411e251765b620eb465800d42abb9639d3875 100644
--- a/dart/pkg/dart2js_incremental/lib/caching_compiler.dart
+++ b/dart/pkg/dart2js_incremental/lib/caching_compiler.dart
@@ -38,15 +38,12 @@ Future<Compiler> reuseCompiler(
       compiler.libraryRoot != libraryRoot ||
       !compiler.hasIncrementalSupport ||
       compiler.hasCrashed ||
-      compiler.compilerWasCancelled ||
       compiler.enqueuer.resolution.hasEnqueuedReflectiveElements ||
       compiler.deferredLoadTask.isProgramSplit) {
     if (compiler != null && compiler.hasIncrementalSupport) {
       print('***FLUSH***');
       if (compiler.hasCrashed) {
         print('Unable to reuse compiler due to crash.');
-      } else if (compiler.compilerWasCancelled) {
-        print('Unable to reuse compiler due to cancel.');
       } else if (compiler.enqueuer.resolution.hasEnqueuedReflectiveElements) {
         print('Unable to reuse compiler due to dart:mirrors.');
       } else if (compiler.deferredLoadTask.isProgramSplit) {