Gets HTMLIFrameElement::embedViewManagerClient to work with dart

sky/engine/tonic/dart_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_DART_CONVERTER_H_
 #define SKY_ENGINE_TONIC_DART_CONVERTER_H_
 
 #include <string>
+#include "mojo/public/cpp/system/handle.h"
 #include "sky/engine/tonic/dart_state.h"
 #include "sky/engine/tonic/dart_string.h"
 #include "sky/engine/tonic/dart_string_cache.h"
 #include "sky/engine/tonic/dart_value.h"
 #include "sky/engine/wtf/text/StringUTF8Adaptor.h"
 #include "sky/engine/wtf/text/WTFString.h"
 
 namespace blink {
 
 // DartConvert converts types back and forth from Sky to Dart. The template
@@ skipping 240 matching lines @@
   static Vector<T> FromArguments(Dart_NativeArguments args,
                                  int index,
                                  Dart_Handle& exception,
                                  bool auto_scope = true) {
     // TODO(abarth): What should we do with auto_scope?
     return FromDart(Dart_GetNativeArgument(args, index));
   }
 };
 
 ////////////////////////////////////////////////////////////////////////////////
+// mojo types
+
+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));
+    return mojo::MakeScopedHandle(mojo_handle);
+  }
+
+  static Dart_Handle ToDart(mojo::ScopedHandleBase<HandleType> mojo_handle) {
+    return Dart_NewInteger(static_cast<int64_t>(mojo_handle.release().value()));
+  }
+};

[abarth-chromium, 2015/02/23 22:29:37]

Please move this declaration to a separate header file, for example
sky/engine/tonic/mojo_converter.h

+
+////////////////////////////////////////////////////////////////////////////////
 // DartValue
 
 template <>
 struct DartConverter<DartValue*> {
   static Dart_Handle ToDart(DartState* state, DartValue* val) {
     return val->dart_value();
   }
 
   static void SetReturnValue(Dart_NativeArguments args, DartValue* val) {
     Dart_SetReturnValue(args, val->dart_value());
@@ skipping 56 matching lines @@
 
 
 // Alias Dart_NewStringFromCString for less typing.
 inline Dart_Handle ToDart(const char* val) {
   return Dart_NewStringFromCString(val);
 }
 
 }  // namespace blink
 
 #endif  // SKY_ENGINE_TONIC_DART_CONVERTER_H_