bindings: Use V8 MaybeLocal<> APIs in Dictionary class

Source/bindings/core/v8/DictionaryHelperForCore.cpp

Index: Source/bindings/core/v8/DictionaryHelperForCore.cpp
diff --git a/Source/bindings/core/v8/DictionaryHelperForCore.cpp b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
index 1dd12c45b8b1104a2d2dae217388af9b990b2617..d23fa441df0c390865f278f6057bef3e9f003c13 100644
--- a/Source/bindings/core/v8/DictionaryHelperForCore.cpp
+++ b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
@@ -66,8 +66,9 @@ bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, bool
     if (!dictionary.get(key, v8Value))
         return false;
 
-    v8::Local<v8::Boolean> v8Bool = v8Value->ToBoolean(dictionary.isolate());
-    if (v8Bool.IsEmpty())
+    v8::MaybeLocal<v8::Boolean> maybeBool = v8Value->ToBoolean(dictionary.context());
+    v8::Local<v8::Boolean> v8Bool;
+    if (!maybeBool.ToLocal(&v8Bool) || v8Bool.IsEmpty())
         return false;
     value = v8Bool->Value();
     return true;
@@ -88,8 +89,9 @@ bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, int3
     if (!dictionary.get(key, v8Value))
         return false;
 
-    v8::Local<v8::Int32> v8Int32 = v8Value->ToInt32(dictionary.isolate());
-    if (v8Int32.IsEmpty())
+    v8::MaybeLocal<v8::Int32> maybeInt32 = v8Value->ToInt32(dictionary.context());
+    v8::Local<v8::Int32> v8Int32;
+    if (!maybeInt32.ToLocal(&v8Int32) || v8Int32.IsEmpty())
         return false;
     value = v8Int32->Value();
     return true;
@@ -204,8 +206,9 @@ bool getNumericType(const Dictionary& dictionary, const String& key, NumericType
     if (!dictionary.get(key, v8Value))
         return false;
 
-    v8::Local<v8::Int32> v8Int32 = v8Value->ToInt32(dictionary.isolate());
-    if (v8Int32.IsEmpty())
+    v8::MaybeLocal<v8::Int32> maybeInt32 = v8Value->ToInt32(dictionary.context());
+    v8::Local<v8::Int32> v8Int32;
+    if (!maybeInt32.ToLocal(&v8Int32) || v8Int32.IsEmpty())
         return false;
     value = static_cast<NumericType>(v8Int32->Value());
     return true;
@@ -236,8 +239,9 @@ bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, unsi
     if (!dictionary.get(key, v8Value))
         return false;
 
-    v8::Local<v8::Integer> v8Integer = v8Value->ToInteger(dictionary.isolate());
-    if (v8Integer.IsEmpty())
+    v8::MaybeLocal<v8::Integer> maybeInteger = v8Value->ToInteger(dictionary.context());
+    v8::Local<v8::Integer> v8Integer;
+    if (!maybeInteger.ToLocal(&v8Integer) || v8Integer.IsEmpty())
         return false;
     value = static_cast<unsigned long>(v8Integer->Value());
     return true;