Remove redundant struct wrapper over union

Both IDBKey and PolicyValue Mojo unions where being wrapped with a
struct with the union as its only member. This CL simplifies that
representation by removing the outer struct.

Change-Id: I0fdfbdca7ae6553e48248e2a6a39a062120c6797
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2374449
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803452}

third_party/blink/common/feature_policy/policy_value_mojom_traits.cc

@@ -6,32 +6,27 @@
 
 namespace mojo {
 
-bool UnionTraits<blink::mojom::PolicyValueDataDataView, blink::PolicyValue>::
-    Read(blink::mojom::PolicyValueDataDataView in, blink::PolicyValue* out) {
+bool UnionTraits<blink::mojom::PolicyValueDataView, blink::PolicyValue>::Read(
+    blink::mojom::PolicyValueDataView in,
+    blink::PolicyValue* out) {
   switch (in.tag()) {
-    case blink::mojom::PolicyValueDataDataView::Tag::BOOL_VALUE:
+    case blink::mojom::PolicyValueDataView::Tag::BOOL_VALUE:
       out->SetType(blink::mojom::PolicyValueType::kBool);
       out->SetBoolValue(in.bool_value());
       return true;
-    case blink::mojom::PolicyValueDataDataView::Tag::DEC_DOUBLE_VALUE:
+    case blink::mojom::PolicyValueDataView::Tag::DEC_DOUBLE_VALUE:
       out->SetType(blink::mojom::PolicyValueType::kDecDouble);
       out->SetDoubleValue(in.dec_double_value());
       return true;
-    case blink::mojom::PolicyValueDataDataView::Tag::ENUM_VALUE:
+    case blink::mojom::PolicyValueDataView::Tag::ENUM_VALUE:
       out->SetType(blink::mojom::PolicyValueType::kEnum);
       out->SetIntValue(in.enum_value());
       return true;
-    case blink::mojom::PolicyValueDataDataView::Tag::NULL_VALUE:
+    case blink::mojom::PolicyValueDataView::Tag::NULL_VALUE:
       break;
   }
   NOTREACHED();
   return false;
 }
 
-bool StructTraits<blink::mojom::PolicyValueDataView, blink::PolicyValue>::Read(
-    blink::mojom::PolicyValueDataView data,
-    blink::PolicyValue* out) {
-  return data.ReadData(out);
-}
-
 }  // namespace mojo

third_party/blink/common/feature_policy/policy_value_mojom_traits.h

@@ -13,23 +13,23 @@ namespace mojo {
 
 template <>
 struct BLINK_COMMON_EXPORT
-    UnionTraits<blink::mojom::PolicyValueDataDataView, blink::PolicyValue> {
+    UnionTraits<blink::mojom::PolicyValueDataView, blink::PolicyValue> {
  public:
-  static blink::mojom::PolicyValueDataDataView::Tag GetTag(
+  static blink::mojom::PolicyValueDataView::Tag GetTag(
       const blink::PolicyValue& value) {
     switch (value.Type()) {
       case blink::mojom::PolicyValueType::kNull:
-        return blink::mojom::PolicyValueDataDataView::Tag::NULL_VALUE;
+        return blink::mojom::PolicyValueDataView::Tag::NULL_VALUE;
       case blink::mojom::PolicyValueType::kBool:
-        return blink::mojom::PolicyValueDataDataView::Tag::BOOL_VALUE;
+        return blink::mojom::PolicyValueDataView::Tag::BOOL_VALUE;
       case blink::mojom::PolicyValueType::kDecDouble:
-        return blink::mojom::PolicyValueDataDataView::Tag::DEC_DOUBLE_VALUE;
+        return blink::mojom::PolicyValueDataView::Tag::DEC_DOUBLE_VALUE;
       case blink::mojom::PolicyValueType::kEnum:
-        return blink::mojom::PolicyValueDataDataView::Tag::ENUM_VALUE;
+        return blink::mojom::PolicyValueDataView::Tag::ENUM_VALUE;
     }
 
     NOTREACHED();
-    return blink::mojom::PolicyValueDataDataView::Tag::NULL_VALUE;
+    return blink::mojom::PolicyValueDataView::Tag::NULL_VALUE;
   }
   static bool null_value(const blink::PolicyValue& value) { return false; }
   static bool bool_value(const blink::PolicyValue& value) {
@@ -41,17 +41,7 @@ struct BLINK_COMMON_EXPORT
   static int32_t enum_value(const blink::PolicyValue& value) {
     return value.IntValue();
   }
-  static bool Read(blink::mojom::PolicyValueDataDataView in,
-                   blink::PolicyValue* out);
-};
-
-template <>
-struct BLINK_COMMON_EXPORT
-    StructTraits<blink::mojom::PolicyValueDataView, blink::PolicyValue> {
-  static const blink::PolicyValue& data(const blink::PolicyValue& value) {
-    return value;
-  }
-  static bool Read(blink::mojom::PolicyValueDataView data,
+  static bool Read(blink::mojom::PolicyValueDataView in,
                    blink::PolicyValue* out);
 };
 

third_party/blink/common/indexeddb/indexed_db_default_mojom_traits.cc

@@ -67,65 +67,65 @@ bool StructTraits<blink::mojom::IDBIndexMetadataDataView,
 }
 
 // static
-blink::mojom::IDBKeyDataDataView::Tag
-UnionTraits<blink::mojom::IDBKeyDataDataView, blink::IndexedDBKey>::GetTag(
+blink::mojom::IDBKeyDataView::Tag
+UnionTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey>::GetTag(
     const blink::IndexedDBKey& key) {
   switch (key.type()) {
     case blink::mojom::IDBKeyType::Array:
-      return blink::mojom::IDBKeyDataDataView::Tag::KEY_ARRAY;
+      return blink::mojom::IDBKeyDataView::Tag::KEY_ARRAY;
     case blink::mojom::IDBKeyType::Binary:
-      return blink::mojom::IDBKeyDataDataView::Tag::BINARY;
+      return blink::mojom::IDBKeyDataView::Tag::BINARY;
     case blink::mojom::IDBKeyType::String:
-      return blink::mojom::IDBKeyDataDataView::Tag::STRING;
+      return blink::mojom::IDBKeyDataView::Tag::STRING;
     case blink::mojom::IDBKeyType::Date:
-      return blink::mojom::IDBKeyDataDataView::Tag::DATE;
+      return blink::mojom::IDBKeyDataView::Tag::DATE;
     case blink::mojom::IDBKeyType::Number:
-      return blink::mojom::IDBKeyDataDataView::Tag::NUMBER;
+      return blink::mojom::IDBKeyDataView::Tag::NUMBER;
     case blink::mojom::IDBKeyType::None:
-      return blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE;
+      return blink::mojom::IDBKeyDataView::Tag::OTHER_NONE;
 
     // Not used, fall through to NOTREACHED.
     case blink::mojom::IDBKeyType::Invalid:  // Only used in blink.
     case blink::mojom::IDBKeyType::Min:;     // Only used in the browser.
   }
   NOTREACHED();
-  return blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE;
+  return blink::mojom::IDBKeyDataView::Tag::OTHER_NONE;
 }
 
 // static
-bool UnionTraits<blink::mojom::IDBKeyDataDataView, blink::IndexedDBKey>::Read(
-    blink::mojom::IDBKeyDataDataView data,
+bool UnionTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey>::Read(
+    blink::mojom::IDBKeyDataView data,
     blink::IndexedDBKey* out) {
   switch (data.tag()) {
-    case blink::mojom::IDBKeyDataDataView::Tag::KEY_ARRAY: {
+    case blink::mojom::IDBKeyDataView::Tag::KEY_ARRAY: {
       std::vector<blink::IndexedDBKey> array;
       if (!data.ReadKeyArray(&array))
         return false;
       *out = blink::IndexedDBKey(std::move(array));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::BINARY: {
+    case blink::mojom::IDBKeyDataView::Tag::BINARY: {
       ArrayDataView<uint8_t> bytes;
       data.GetBinaryDataView(&bytes);
       std::string binary(bytes.data(), bytes.data() + bytes.size());
       *out = blink::IndexedDBKey(std::move(binary));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::STRING: {
+    case blink::mojom::IDBKeyDataView::Tag::STRING: {
       base::string16 string;
       if (!data.ReadString(&string))
         return false;
       *out = blink::IndexedDBKey(std::move(string));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::DATE:
+    case blink::mojom::IDBKeyDataView::Tag::DATE:
       *out = blink::IndexedDBKey(data.date(), blink::mojom::IDBKeyType::Date);
       return true;
-    case blink::mojom::IDBKeyDataDataView::Tag::NUMBER:
+    case blink::mojom::IDBKeyDataView::Tag::NUMBER:
       *out =
           blink::IndexedDBKey(data.number(), blink::mojom::IDBKeyType::Number);
       return true;
-    case blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE:
+    case blink::mojom::IDBKeyDataView::Tag::OTHER_NONE:
       *out = blink::IndexedDBKey(blink::mojom::IDBKeyType::None);
       return true;
   }
@@ -133,20 +133,6 @@ bool UnionTraits<blink::mojom::IDBKeyDataDataView, blink::IndexedDBKey>::Read(
   return false;
 }
 
-// static
-const blink::IndexedDBKey&
-StructTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey>::data(
-    const blink::IndexedDBKey& key) {
-  return key;
-}
-
-// static
-bool StructTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey>::Read(
-    blink::mojom::IDBKeyDataView data,
-    blink::IndexedDBKey* out) {
-  return data.ReadData(out);
-}
-
 // static
 blink::mojom::IDBKeyPathDataPtr
 StructTraits<blink::mojom::IDBKeyPathDataView, blink::IndexedDBKeyPath>::data(

third_party/blink/public/common/indexeddb/indexed_db_default_mojom_traits.h

@@ -84,11 +84,10 @@ struct BLINK_COMMON_EXPORT StructTraits<blink::mojom::IDBIndexMetadataDataView,
 
 template <>
 struct BLINK_COMMON_EXPORT
-    UnionTraits<blink::mojom::IDBKeyDataDataView, blink::IndexedDBKey> {
-  static blink::mojom::IDBKeyDataDataView::Tag GetTag(
+    UnionTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey> {
+  static blink::mojom::IDBKeyDataView::Tag GetTag(
       const blink::IndexedDBKey& key);
-  static bool Read(blink::mojom::IDBKeyDataDataView data,
-                   blink::IndexedDBKey* out);
+  static bool Read(blink::mojom::IDBKeyDataView data, blink::IndexedDBKey* out);
   static const std::vector<blink::IndexedDBKey>& key_array(
       const blink::IndexedDBKey& key) {
     return key.array();
@@ -111,13 +110,6 @@ struct BLINK_COMMON_EXPORT
   }
 };
 
-template <>
-struct BLINK_COMMON_EXPORT
-    StructTraits<blink::mojom::IDBKeyDataView, blink::IndexedDBKey> {
-  static const blink::IndexedDBKey& data(const blink::IndexedDBKey& key);
-  static bool Read(blink::mojom::IDBKeyDataView data, blink::IndexedDBKey* out);
-};
-
 template <>
 struct BLINK_COMMON_EXPORT
     StructTraits<blink::mojom::IDBKeyPathDataView, blink::IndexedDBKeyPath> {

third_party/blink/public/mojom/feature_policy/policy_value.mojom

@@ -20,15 +20,9 @@ enum PolicyValueType {
 // This union includes all the types that can be used to specify a policy's
 // parameter.
 // TODO(crbug.com/1119481): Add the following types: inc/dec int, inc double, set.
-union PolicyValueData {
+union PolicyValue {
   bool null_value;
   bool bool_value;
   double dec_double_value;
   int32 enum_value;
 };
-
-// Defined as a structure so that it can be typemapped with StructTraits.
-struct PolicyValue {
-  PolicyValueData data;
-};
-

third_party/blink/public/mojom/indexeddb/indexeddb.mojom

@@ -85,7 +85,7 @@ enum IDBTransactionDurability {
   Relaxed,
 };
 
-union IDBKeyData {
+union IDBKey {
   array<IDBKey> key_array;
   array<uint8> binary;
   mojo_base.mojom.String16 string;
@@ -95,11 +95,6 @@ union IDBKeyData {
   bool other_none;
 };
 
-// Defined as a structure so that it can by typemapped with StructTraits.
-struct IDBKey {
-  IDBKeyData data;
-};
-
 // In order of the least to the highest precedent in terms of sort order.
 // These values are written to logs. New enum values can be added, but
 // existing enums must never be renumbered or deleted and reused.

third_party/blink/renderer/modules/indexeddb/indexed_db_blink_mojom_traits.cc

@@ -81,66 +81,65 @@ bool StructTraits<blink::mojom::IDBIndexMetadataDataView,
 }
 
 // static
-blink::mojom::IDBKeyDataDataView::Tag
-UnionTraits<blink::mojom::IDBKeyDataDataView, std::unique_ptr<blink::IDBKey>>::
+blink::mojom::IDBKeyDataView::Tag
+UnionTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>>::
     GetTag(const std::unique_ptr<blink::IDBKey>& key) {
   DCHECK(key.get());
   switch (key->GetType()) {
     case blink::mojom::IDBKeyType::Array:
-      return blink::mojom::IDBKeyDataDataView::Tag::KEY_ARRAY;
+      return blink::mojom::IDBKeyDataView::Tag::KEY_ARRAY;
     case blink::mojom::IDBKeyType::Binary:
-      return blink::mojom::IDBKeyDataDataView::Tag::BINARY;
+      return blink::mojom::IDBKeyDataView::Tag::BINARY;
     case blink::mojom::IDBKeyType::String:
-      return blink::mojom::IDBKeyDataDataView::Tag::STRING;
+      return blink::mojom::IDBKeyDataView::Tag::STRING;
     case blink::mojom::IDBKeyType::Date:
-      return blink::mojom::IDBKeyDataDataView::Tag::DATE;
+      return blink::mojom::IDBKeyDataView::Tag::DATE;
     case blink::mojom::IDBKeyType::Number:
-      return blink::mojom::IDBKeyDataDataView::Tag::NUMBER;
+      return blink::mojom::IDBKeyDataView::Tag::NUMBER;
     case blink::mojom::IDBKeyType::None:
-      return blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE;
+      return blink::mojom::IDBKeyDataView::Tag::OTHER_NONE;
 
     // Not used, fall through to NOTREACHED.
     case blink::mojom::IDBKeyType::Invalid:  // Only used in blink.
     case blink::mojom::IDBKeyType::Min:;     // Only used in the browser.
   }
   NOTREACHED();
-  return blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE;
+  return blink::mojom::IDBKeyDataView::Tag::OTHER_NONE;
 }
 
 // static
-bool UnionTraits<
-    blink::mojom::IDBKeyDataDataView,
-    std::unique_ptr<blink::IDBKey>>::Read(blink::mojom::IDBKeyDataDataView data,
+bool UnionTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>>::
+    Read(blink::mojom::IDBKeyDataView data,
          std::unique_ptr<blink::IDBKey>* out) {
   switch (data.tag()) {
-    case blink::mojom::IDBKeyDataDataView::Tag::KEY_ARRAY: {
+    case blink::mojom::IDBKeyDataView::Tag::KEY_ARRAY: {
       Vector<std::unique_ptr<blink::IDBKey>> array;
       if (!data.ReadKeyArray(&array))
         return false;
       *out = blink::IDBKey::CreateArray(std::move(array));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::BINARY: {
+    case blink::mojom::IDBKeyDataView::Tag::BINARY: {
       ArrayDataView<uint8_t> bytes;
       data.GetBinaryDataView(&bytes);
       *out = blink::IDBKey::CreateBinary(SharedBuffer::Create(
           reinterpret_cast<const char*>(bytes.data()), bytes.size()));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::STRING: {
+    case blink::mojom::IDBKeyDataView::Tag::STRING: {
       String string;
       if (!data.ReadString(&string))
         return false;
       *out = blink::IDBKey::CreateString(String(string));
       return true;
     }
-    case blink::mojom::IDBKeyDataDataView::Tag::DATE:
+    case blink::mojom::IDBKeyDataView::Tag::DATE:
       *out = blink::IDBKey::CreateDate(data.date());
       return true;
-    case blink::mojom::IDBKeyDataDataView::Tag::NUMBER:
+    case blink::mojom::IDBKeyDataView::Tag::NUMBER:
       *out = blink::IDBKey::CreateNumber(data.number());
       return true;
-    case blink::mojom::IDBKeyDataDataView::Tag::OTHER_NONE:
+    case blink::mojom::IDBKeyDataView::Tag::OTHER_NONE:
       *out = blink::IDBKey::CreateNone();
       return true;
   }
@@ -150,33 +149,18 @@ bool UnionTraits<
 
 // static
 const Vector<std::unique_ptr<blink::IDBKey>>&
-UnionTraits<blink::mojom::IDBKeyDataDataView, std::unique_ptr<blink::IDBKey>>::
+UnionTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>>::
     key_array(const std::unique_ptr<blink::IDBKey>& key) {
   return key->Array();
 }
 
 // static
 Vector<uint8_t>
-UnionTraits<blink::mojom::IDBKeyDataDataView, std::unique_ptr<blink::IDBKey>>::
+UnionTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>>::
     binary(const std::unique_ptr<blink::IDBKey>& key) {
   return key->Binary()->CopyAs<Vector<uint8_t>>();
 }
 
-// static
-const std::unique_ptr<blink::IDBKey>&
-StructTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>>::
-    data(const std::unique_ptr<blink::IDBKey>& key) {
-  return key;
-}
-
-// static
-bool StructTraits<
-    blink::mojom::IDBKeyDataView,
-    std::unique_ptr<blink::IDBKey>>::Read(blink::mojom::IDBKeyDataView data,
-                                          std::unique_ptr<blink::IDBKey>* out) {
-  return data.ReadData(out);
-}
-
 // static
 Vector<uint8_t>
 StructTraits<blink::mojom::IDBValueDataView, std::unique_ptr<blink::IDBValue>>::

third_party/blink/renderer/modules/indexeddb/indexed_db_blink_mojom_traits.h

@@ -87,11 +87,11 @@ struct MODULES_EXPORT StructTraits<blink::mojom::IDBIndexMetadataDataView,
 };
 
 template <>
-struct MODULES_EXPORT UnionTraits<blink::mojom::IDBKeyDataDataView,
-                                  std::unique_ptr<blink::IDBKey>> {
-  static blink::mojom::IDBKeyDataDataView::Tag GetTag(
+struct MODULES_EXPORT
+    UnionTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>> {
+  static blink::mojom::IDBKeyDataView::Tag GetTag(
       const std::unique_ptr<blink::IDBKey>& key);
-  static bool Read(blink::mojom::IDBKeyDataDataView data,
+  static bool Read(blink::mojom::IDBKeyDataView data,
                    std::unique_ptr<blink::IDBKey>* out);
   static const Vector<std::unique_ptr<blink::IDBKey>>& key_array(
       const std::unique_ptr<blink::IDBKey>& key);
@@ -116,15 +116,6 @@ struct MODULES_EXPORT UnionTraits<blink::mojom::IDBKeyDataDataView,
   }
 };
 
-template <>
-struct MODULES_EXPORT
-    StructTraits<blink::mojom::IDBKeyDataView, std::unique_ptr<blink::IDBKey>> {
-  static const std::unique_ptr<blink::IDBKey>& data(
-      const std::unique_ptr<blink::IDBKey>& key);
-  static bool Read(blink::mojom::IDBKeyDataView data,
-                   std::unique_ptr<blink::IDBKey>* out);
-};
-
 template <>
 struct MODULES_EXPORT StructTraits<blink::mojom::IDBValueDataView,
                                    std::unique_ptr<blink::IDBValue>> {