Use the tonic namespace for tonic + resulting build fixes

tonic/dart_state.h

 // 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.
 
 #ifndef SKY_ENGINE_TONIC_DART_STATE_H_
 #define SKY_ENGINE_TONIC_DART_STATE_H_
 
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/supports_user_data.h"
 #include "dart/runtime/include/dart_api.h"
 #include "tonic/dart_api_scope.h"
 #include "tonic/dart_isolate_scope.h"
 #include "tonic/dart_persistent_value.h"
 
-namespace blink {
+namespace tonic {
 class DartClassLibrary;
 class DartExceptionFactory;
 class DartLibraryLoader;
 class DartTimerHeap;
 
 // DartState represents the state associated with a given Dart isolate. The
 // lifetime of this object is controlled by the DartVM. If you want to hold a
 // reference to a DartState instance, please hold a base::WeakPtr<DartState>.
 //
 // DartState is analogous to gin::PerIsolateData and JSC::ExecState.
 class DartState : public base::SupportsUserData {
  public:
   class Scope {
    public:
     Scope(DartState* dart_state);
     ~Scope();
 
    private:
     DartIsolateScope scope_;
     DartApiScope api_scope_;
   };
 
   DartState();
-  virtual ~DartState();
+  ~DartState() override;
 
   static DartState* From(Dart_Isolate isolate);
   static DartState* Current();
 
   base::WeakPtr<DartState> GetWeakPtr();
 
   Dart_Isolate isolate() { return isolate_; }
   void SetIsolate(Dart_Isolate isolate);
 
   DartClassLibrary& class_library() { return *class_library_; }
@@ skipping 12 matching lines @@
   std::unique_ptr<DartLibraryLoader> library_loader_;
   std::unique_ptr<DartTimerHeap> timer_heap_;
   DartPersistentValue index_handle_;
 
  protected:
   base::WeakPtrFactory<DartState> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DartState);
 };
 
-}  // namespace blink
+}  // namespace tonic
 
 #endif  // SKY_ENGINE_TONIC_DART_STATE_H_