Move all flags to CompilerOptions (first step to stop passing the compiler to

pkg/compiler/lib/src/dart_backend/outputter.dart

Index: pkg/compiler/lib/src/dart_backend/outputter.dart
diff --git a/pkg/compiler/lib/src/dart_backend/outputter.dart b/pkg/compiler/lib/src/dart_backend/outputter.dart
index 3e6f5645a741d4586e90ae7eb2860161f7dc6c8c..484bda298d61885beb97f75d175610b88ed8d115 100644
--- a/pkg/compiler/lib/src/dart_backend/outputter.dart
+++ b/pkg/compiler/lib/src/dart_backend/outputter.dart
@@ -511,7 +511,7 @@ class MainOutputGenerator {
           ? mainName.substring(0, mainName.length - 5)
           : mainName;
       // Map each library to a path based on the uri of the original
-      // library and [compiler.outputUri].
+      // library and [compiler.options.outputUri].
       Set<String> usedLibraryPaths = new Set<String>();
       for (LibraryElement library in libraryInfo.userLibraries) {
         if (library == mainFunction.library) {
@@ -602,4 +602,4 @@ class MainOutputGenerator {
 
     return totalSize;
   }
-}
+}