refactor(compiler): don’t write summaries for jit by default

The default is false externally but true internally at Google.

packages/compiler/src/aot/compiler.ts

@@ -35,7 +35,8 @@ export class AotCompiler {
       private _viewCompiler: ViewCompiler, private _ngModuleCompiler: NgModuleCompiler,
       private _outputEmitter: OutputEmitter,
       private _summaryResolver: SummaryResolver<StaticSymbol>, private _localeId: string|null,
-      private _translationFormat: string|null, private _symbolResolver: StaticSymbolResolver) {}
+      private _translationFormat: string|null, private _enableSummariesForJit: boolean|null,
+      private _symbolResolver: StaticSymbolResolver) {}
 
   clearCache() { this._metadataResolver.clearCache(); }
 
@@ -204,10 +205,12 @@ export class AotCompiler {
             o.StmtModifier.Exported
           ]));
     });
-    return [
-      new GeneratedFile(srcFileUrl, summaryFileName(srcFileUrl), json),
-      this._codegenSourceModule(srcFileUrl, forJitOutputCtx)
-    ];
+    const summaryJson = new GeneratedFile(srcFileUrl, summaryFileName(srcFileUrl), json);
+    if (this._enableSummariesForJit) {
+      return [summaryJson, this._codegenSourceModule(srcFileUrl, forJitOutputCtx)];
+    };
+
+    return [summaryJson];
   }
 
   private _compileModule(outputCtx: OutputContext, ngModuleType: StaticSymbol): void {

packages/compiler/src/aot/compiler_factory.ts

@@ -70,6 +70,7 @@ export function createAotCompiler(compilerHost: AotCompilerHost, options: AotCom
   const compiler = new AotCompiler(
       config, compilerHost, staticReflector, resolver, tmplParser, new StyleCompiler(urlResolver),
       viewCompiler, new NgModuleCompiler(staticReflector), new TypeScriptEmitter(), summaryResolver,
-      options.locale || null, options.i18nFormat || null, symbolResolver);
+      options.locale || null, options.i18nFormat || null, options.enableSummariesForJit || null,
+      symbolResolver);
   return {compiler, reflector: staticReflector};
 }

packages/compiler/src/aot/compiler_options.ts

@@ -14,4 +14,5 @@ export interface AotCompilerOptions {
   translations?: string;
   missingTranslation?: MissingTranslationStrategy;
   enableLegacyTemplate?: boolean;
+  enableSummariesForJit?: boolean
 }