feat(di): provide two ways to create an injector, resolved and unresolved

Add two factory static functions to Injector: resolveAndCreate and
fromResolvedBindings.

We want to avoid resolution and flattening every time we create a new
injector. This commit allows the user to cache resolved bindings and
reuse them.

modules/benchpress/src/runner.js

@@ -50,7 +50,7 @@ export class Runner {
     if (isPresent(bindings)) {
       ListWrapper.push(sampleBindings, bindings);
     }
-    return new Injector(sampleBindings).asyncGet(Sampler)
+    return Injector.resolveAndCreate(sampleBindings).asyncGet(Sampler)
       .then( (sampler) => sampler.sample() );
   }
 }

modules/benchpress/test/metric/multi_metric_spec.js

@@ -18,7 +18,7 @@ import { Metric, MultiMetric, bind, Injector } from 'benchpress/common';
 
 export function main() {
   function createMetric(ids) {
-    return new Injector([
+    return Injector.resolveAndCreate([
       ListWrapper.map(ids, (id) => bind(id).toValue(new MockMetric(id)) ),
       MultiMetric.createBindings(ids)
     ]).asyncGet(MultiMetric);

modules/benchpress/test/metric/perflog_metric_spec.js

@@ -45,7 +45,7 @@ export function main() {
       }),
       bind(WebDriverExtension).toValue(new MockDriverExtension(perfLogs, commandLog, perfLogFeatures))
     ];
-    return new Injector(bindings).get(PerflogMetric);
+    return Injector.resolveAndCreate(bindings).get(PerflogMetric);
   }
 
   describe('perflog metric', () => {

modules/benchpress/test/reporter/console_reporter_spec.js

@@ -29,7 +29,7 @@ export function main() {
       if (isPresent(columnWidth)) {
         ListWrapper.push(bindings, bind(ConsoleReporter.COLUMN_WIDTH).toValue(columnWidth));
       }
-      reporter = new Injector(bindings).get(ConsoleReporter);
+      reporter = Injector.resolveAndCreate(bindings).get(ConsoleReporter);
     }
 
     it('should print the sample id, description and table header', () => {

modules/benchpress/test/reporter/json_file_reporter_spec.js

@@ -42,7 +42,7 @@ export function main() {
           return PromiseWrapper.resolve(null);
         })
       ];
-      return new Injector(bindings).get(JsonFileReporter);
+      return Injector.resolveAndCreate(bindings).get(JsonFileReporter);
     }
 
     it('should write all data into a file', inject([AsyncTestCompleter], (async) => {

modules/benchpress/test/reporter/multi_reporter_spec.js

@@ -19,7 +19,7 @@ import { Reporter, MultiReporter, bind, Injector, MeasureValues } from 'benchpre
 
 export function main() {
   function createReporters(ids) {
-    return new Injector([
+    return Injector.resolveAndCreate([
       ListWrapper.map(ids, (id) => bind(id).toValue(new MockReporter(id)) ),
       MultiReporter.createBindings(ids)
     ]).asyncGet(MultiReporter);

modules/benchpress/test/sampler_spec.js

@@ -68,7 +68,7 @@ export function main() {
         ListWrapper.push(bindings, bind(Options.FORCE_GC).toValue(forceGc));
       }
 
-      sampler = new Injector(bindings).get(Sampler);
+      sampler = Injector.resolveAndCreate(bindings).get(Sampler);
     }
 
     it('should call the prepare and execute callbacks using WebDriverAdapter.waitFor', inject([AsyncTestCompleter], (async) => {

modules/benchpress/test/validator/regression_slope_validator_spec.js

@@ -11,7 +11,7 @@ export function main() {
     var validator;
 
     function createValidator({size, metric}) {
-      validator = new Injector([
+      validator = Injector.resolveAndCreate([
         RegressionSlopeValidator.BINDINGS,
         bind(RegressionSlopeValidator.METRIC).toValue(metric),
         bind(RegressionSlopeValidator.SAMPLE_SIZE).toValue(size)

modules/benchpress/test/validator/size_validator_spec.js

@@ -11,7 +11,7 @@ export function main() {
     var validator;
 
     function createValidator(size) {
-      validator = new Injector([
+      validator = Injector.resolveAndCreate([
         SizeValidator.BINDINGS,
         bind(SizeValidator.SAMPLE_SIZE).toValue(size)
       ]).get(SizeValidator);

modules/benchpress/test/web_driver_extension_spec.js

@@ -19,7 +19,7 @@ import { WebDriverExtension, bind, Injector, Options } from 'benchpress/common';
 
 export function main() {
   function createExtension(ids, caps) {
-    return new Injector([
+    return Injector.resolveAndCreate([
       ListWrapper.map(ids, (id) => bind(id).toValue(new MockExtension(id)) ),
       bind(Options.CAPABILITIES).toValue(caps),
       WebDriverExtension.bindTo(ids)

modules/benchpress/test/webdriver/chrome_driver_extension_spec.js

@@ -38,7 +38,7 @@ export function main() {
         perfRecords = [];
       }
       log = [];
-      extension = new Injector([
+      extension = Injector.resolveAndCreate([
         ChromeDriverExtension.BINDINGS,
         bind(WebDriverAdapter).toValue(new MockDriverAdapter(log, perfRecords, messageMethod))
       ]).get(ChromeDriverExtension);

modules/benchpress/test/webdriver/ios_driver_extension_spec.js

@@ -34,7 +34,7 @@ export function main() {
         perfRecords = [];
       }
       log = [];
-      extension = new Injector([
+      extension = Injector.resolveAndCreate([
         IOsDriverExtension.BINDINGS,
         bind(WebDriverAdapter).toValue(new MockDriverAdapter(log, perfRecords))
       ]).get(IOsDriverExtension);