Teach SkyView how to load the main script

sky/engine/core/script/dart_loader.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/script/dart_loader.h"
 
 #include "base/callback.h"
 #include "base/trace_event/trace_event.h"
 #include "mojo/common/data_pipe_drainer.h"
@@ skipping 213 matching lines @@
 
 void DartLoader::WaitForDependencies(
     const HashSet<DartDependency*>& dependencies,
     const base::Closure& callback) {
   if (dependencies.isEmpty())
     return callback.Run();
   dependency_watchers_.add(
       adoptPtr(new DependencyWatcher(dependencies, callback)));
 }
 
-Dart_Handle DartLoader::Import(Dart_Handle library, Dart_Handle url) {
-  KURL parsed_url(ParsedURLString, StringFromDart(url));
-  const auto& result = pending_libraries_.add(parsed_url.string(), nullptr);
+void DartLoader::LoadLibrary(const KURL& url) {
+  const auto& result = pending_libraries_.add(url.string(), nullptr);
   if (result.isNewEntry) {
-    OwnPtr<Job> job = adoptPtr(new ImportJob(this, parsed_url));
+    OwnPtr<Job> job = adoptPtr(new ImportJob(this, url));
     result.storedValue->value = job.get();
     jobs_.add(job.release());
   }
   if (dependency_catcher_)
     dependency_catcher_->AddDependency(result.storedValue->value);
+}
+
+Dart_Handle DartLoader::Import(Dart_Handle library, Dart_Handle url) {
+  LoadLibrary(KURL(ParsedURLString, StringFromDart(url)));
   return Dart_True();
 }
 
 Dart_Handle DartLoader::Source(Dart_Handle library, Dart_Handle url) {
   KURL parsed_url(ParsedURLString, StringFromDart(url));
   OwnPtr<Job> job = adoptPtr(new SourceJob(this, parsed_url, library));
   if (dependency_catcher_)
     dependency_catcher_->AddDependency(job.get());
   jobs_.add(job.release());
   return Dart_True();
@@ skipping 39 matching lines @@
 
   WatcherSignaler watcher_signaler(*this, job);
 
   LOG(ERROR) << "Library Load failed: " << job->url().string().utf8().data();
   // TODO(eseidel): Call Dart_LibraryHandleError in the SourceJob case?
 
   jobs_.remove(job);
 }
 
 }  // namespace blink