Use the tonic namespace for tonic + resulting build fixes

tonic/dart_library_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 "tonic/dart_library_loader.h"
 
 #include "base/callback.h"
 #include "base/trace_event/trace_event.h"
 #include "mojo/common/data_pipe_drainer.h"
 #include "tonic/dart_api_scope.h"
 #include "tonic/dart_converter.h"
 #include "tonic/dart_dependency_catcher.h"
 #include "tonic/dart_error.h"
 #include "tonic/dart_isolate_scope.h"
 #include "tonic/dart_library_provider.h"
 #include "tonic/dart_state.h"
 
 using mojo::common::DataPipeDrainer;
 
-namespace blink {
+namespace tonic {
 
 namespace {
 
 // Helper to erase a T* from a container of std::unique_ptr<T>s.
 template<typename T, typename C>
 void EraseUniquePtr(C& container, T* item) {
   std::unique_ptr<T> key = std::unique_ptr<T>(item);
   container.erase(key);
   key.release();
 }
@@ skipping 266 matching lines @@
   DartApiScope api_scope;
 
   WatcherSignaler watcher_signaler(*this, job);
 
   LOG(ERROR) << "Library Load failed: " << job->name();
   // TODO(eseidel): Call Dart_LibraryHandleError in the SourceJob case?
 
   EraseUniquePtr<Job>(jobs_, job);
 }
 
-}  // namespace blink
+}  // namespace tonic