Use the tonic namespace for tonic + resulting build fixes

tonic/mojo_converter.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_MOJO_CONVERTER_H_
 #define SKY_ENGINE_TONIC_MOJO_CONVERTER_H_
 
 #include "mojo/public/cpp/system/handle.h"
 #include "tonic/dart_converter.h"
 
-namespace blink {
+namespace tonic {
 
 template <typename HandleType>
 struct DartConverter<mojo::ScopedHandleBase<HandleType>> {
   static mojo::ScopedHandleBase<HandleType> FromDart(Dart_Handle handle) {
     uint64_t mojo_handle64 = 0;
     Dart_Handle result = Dart_IntegerToUint64(handle, &mojo_handle64);
     if (Dart_IsError(result) || !mojo_handle64)
       return mojo::ScopedHandleBase<HandleType>();
 
     HandleType mojo_handle(static_cast<MojoHandle>(mojo_handle64));
@@ skipping 12 matching lines @@
     int64_t mojo_handle64 = 0;
     Dart_Handle result = Dart_GetNativeIntegerArgument(args, index, &mojo_handle64);
     if (Dart_IsError(result) || !mojo_handle64)
       return mojo::ScopedHandleBase<HandleType>();
 
     HandleType mojo_handle(static_cast<MojoHandle>(mojo_handle64));
     return mojo::MakeScopedHandle(mojo_handle);
   }
 };
 
-}  // namespace blink
+}  // namespace tonic
 
 #endif  // SKY_ENGINE_TONIC_MOJO_CONVERTER_H_