bindings: Add ToV8() overload for HeapVector<std::pair<String, T>>.

third_party/WebKit/Source/bindings/core/v8/ToV8.h

 // Copyright 2014 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 ToV8_h
 #define ToV8_h
 
 // ToV8() provides C++ -> V8 conversion. Note that ToV8() can return an empty
 // handle. Call sites must check IsEmpty() before using return value.
 
@@ skipping 242 matching lines @@
     if (v8Value.IsEmpty())
       v8Value = v8::Undefined(isolate);
     if (!v8CallBoolean(object->CreateDataProperty(
             isolate->GetCurrentContext(), v8String(isolate, value[i].first),
             v8Value)))
       return v8::Local<v8::Value>();
   }
   return object;
 }
 
+template <typename T>
+inline v8::Local<v8::Value> ToV8(const HeapVector<std::pair<String, T>>& value,
+                                 v8::Local<v8::Object> creationContext,
+                                 v8::Isolate* isolate) {
+  v8::Local<v8::Object> object;
+  {
+    v8::Context::Scope contextScope(creationContext->CreationContext());
+    object = v8::Object::New(isolate);
+  }
+  for (unsigned i = 0; i < value.size(); ++i) {
+    v8::Local<v8::Value> v8Value = ToV8(value[i].second, object, isolate);
+    if (v8Value.IsEmpty())
+      v8Value = v8::Undefined(isolate);
+    if (!v8CallBoolean(object->CreateDataProperty(
+            isolate->GetCurrentContext(), v8String(isolate, value[i].first),
+            v8Value)))
+      return v8::Local<v8::Value>();
+  }
+  return object;
+}
+
 template <typename Sequence>
 inline v8::Local<v8::Value> toV8SequenceInternal(
     const Sequence& sequence,
     v8::Local<v8::Object> creationContext,
     v8::Isolate* isolate) {
   v8::Local<v8::Array> array;
   {
     v8::Context::Scope contextScope(creationContext->CreationContext());
     array = v8::Array::New(isolate, sequence.size());
   }
@@ skipping 35 matching lines @@
 // Cannot define in ScriptValue because of the circular dependency between toV8
 // and ScriptValue
 template <typename T>
 inline ScriptValue ScriptValue::from(ScriptState* scriptState, T&& value) {
   return ScriptValue(scriptState, ToV8(std::forward<T>(value), scriptState));
 }
 
 }  // namespace blink
 
 #endif  // ToV8_h