Fix deferred loading with multiple apps on same page.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index 95ea5d973d6a6062230a42196ffc443c6c052dfd..62ea9ea2b7c93882a7f565b7c9f34559be944362 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -157,6 +157,8 @@ class OldEmitter implements Emitter {
   String get lazyInitializerName
       => '${namer.isolateName}.${lazyInitializerProperty}';
   String get initName => 'init';
+  String get deferredInitializedName => 'deferredInitialized';
+
   String get makeConstListProperty
       => namer.getMappedInstanceName('makeConstantList');
 
@@ -1828,21 +1830,30 @@ function(originalDescriptor, name, holder, isStatic, globalFunctionsAccess) {
                                Map<OutputUnit, String> deferredLoadHashes) {
     // Function for checking if a hunk is loaded given its hash.
     buffer.write(jsAst.prettyPrint(

[floitsch, 2015/01/07 13:04:31]

Put all these statements together into one string.

buffer.write(jsAst.prettyPrint(js.statement('''
#isHunkLoaded = ...
#... = ...
#...

[sigurdm, 2015/01/07 13:37:13]

Done.

-        js('# = function(hunkHash) {'
+        js.statement('# = function(hunkHash) {'
            '  return !!$deferredInitializers[hunkHash];'
-           '}', generateEmbeddedGlobalAccess(embeddedNames.IS_HUNK_LOADED)),
+           '};', generateEmbeddedGlobalAccess(embeddedNames.IS_HUNK_LOADED)),
+        compiler, monitor: compiler.dumpInfoTask));
+    buffer.write(jsAst.prettyPrint(
+        js.statement('$initName.$deferredInitializedName = new Object(null);'),

[floitsch, 2015/01/07 13:04:31]

this looks like a bad "initName" of an embedded global. These are deprecated.

[sigurdm, 2015/01/07 13:37:13]

Changed it to an embedded global.

+        compiler, monitor: compiler.dumpInfoTask));
+    // Function for checking if a hunk is initialized given its hash.
+    buffer.write(jsAst.prettyPrint(
+        js.statement('# = function(hunkHash) {'
+             'return $initName.$deferredInitializedName[hunkHash];'
+           '};',
+           generateEmbeddedGlobalAccess(embeddedNames.IS_HUNK_INITIALIZED)),
         compiler, monitor: compiler.dumpInfoTask));
-    buffer.write('$N');
     // Function for initializing a loaded hunk, given its hash.
     buffer.write(jsAst.prettyPrint(
-        js('# = function(hunkHash) {'
-           '  $deferredInitializers[hunkHash]('
-                '$globalsHolder, ${namer.currentIsolate})'
-           '}',
+        js.statement('# = function(hunkHash) {'
+             '$deferredInitializers[hunkHash]('
+               '$globalsHolder, ${namer.currentIsolate});'
+             '$initName.deferredInitialized[hunkHash] = true;'
+           '};',
            generateEmbeddedGlobalAccess(
                embeddedNames.INITIALIZE_LOADED_HUNK)),
         compiler, monitor: compiler.dumpInfoTask));
-    buffer.write('$N');
     // Write a javascript mapping from Deferred import load ids (derrived
     // from the import prefix.) to a list of lists of uris of hunks to load,
     // and a corresponding mapping to a list of hashes used by