Decouple SSA builder from codegen-work-item

pkg/compiler/lib/src/dump_info.dart

Index: pkg/compiler/lib/src/dump_info.dart
diff --git a/pkg/compiler/lib/src/dump_info.dart b/pkg/compiler/lib/src/dump_info.dart
index 08a51d921a97d00f6d2752b8acaf07cb28c73dd4..5cba0f98159aad5b2a610f235e696be43dfaf38c 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -345,7 +345,17 @@ class Selection {
   Selection(this.selectedElement, this.mask);
 }
 
-class DumpInfoTask extends CompilerTask {
+/// Interface used to record information from different parts of the compiler so
+/// we can emit them in the dump-info task.
+// TODO(sigmund,het): move more features here. Ideallly the dump-info task
+// shouldn't reach into internals of other parts of the compiler. For example,
+// we currently reach into the full emitter and as a result we don't support
+// dump-info when using the startup-emitter (issue #24190).
+abstract class InfoReporter {
+  void reportInlined(Element element, Element inlinedFrom);
+}
+
+class DumpInfoTask extends CompilerTask implements InfoReporter {
   DumpInfoTask(Compiler compiler) : super(compiler);
 
   String get name => "Dump Info";
@@ -379,7 +389,7 @@ class DumpInfoTask extends CompilerTask {
     _programSize = programSize;
   }
 
-  void registerInlined(Element element, Element inlinedFrom) {
+  void reportInlined(Element element, Element inlinedFrom) {
     inlineCount.putIfAbsent(element, () => 0);
     inlineCount[element] += 1;
     inlineMap.putIfAbsent(inlinedFrom, () => new List<Element>());