Add new experimental IDBObjectStore.getKey(query) API

third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
index 2f035a201a6dd6e53b3f691d8f07dbd57a52a8e3..ec21129359299443b6d05625de0b5fe9d3132d97 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -114,7 +114,39 @@ IDBRequest* IDBObjectStore::get(ScriptState* scriptState, const ScriptValue& key
     }
 
     IDBRequest* request = IDBRequest::create(scriptState, IDBAny::create(this), m_transaction.get());
-    backendDB()->get(m_transaction->id(), id(), IDBIndexMetadata::InvalidId, keyRange, false, WebIDBCallbacksImpl::create(request).release());
+    backendDB()->get(m_transaction->id(), id(), IDBIndexMetadata::InvalidId, keyRange, false /* keyOnly */, WebIDBCallbacksImpl::create(request).release());
+    return request;
+}
+
+IDBRequest* IDBObjectStore::getKey(ScriptState* scriptState, const ScriptValue& key, ExceptionState& exceptionState)
+{
+    IDB_TRACE("IDBObjectStore::getKey");
+    if (isDeleted()) {
+        exceptionState.throwDOMException(InvalidStateError, IDBDatabase::objectStoreDeletedErrorMessage);
+        return nullptr;
+    }
+    if (m_transaction->isFinished() || m_transaction->isFinishing()) {
+        exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionFinishedErrorMessage);
+        return nullptr;
+    }
+    if (!m_transaction->isActive()) {
+        exceptionState.throwDOMException(TransactionInactiveError, IDBDatabase::transactionInactiveErrorMessage);
+        return nullptr;
+    }
+    IDBKeyRange* keyRange = IDBKeyRange::fromScriptValue(scriptState->getExecutionContext(), key, exceptionState);
+    if (exceptionState.hadException())
+        return nullptr;
+    if (!keyRange) {
+        exceptionState.throwDOMException(DataError, IDBDatabase::noKeyOrKeyRangeErrorMessage);
+        return nullptr;
+    }
+    if (!backendDB()) {
+        exceptionState.throwDOMException(InvalidStateError, IDBDatabase::databaseClosedErrorMessage);
+        return nullptr;
+    }
+
+    IDBRequest* request = IDBRequest::create(scriptState, IDBAny::create(this), m_transaction.get());
+    backendDB()->get(m_transaction->id(), id(), IDBIndexMetadata::InvalidId, keyRange, true /* keyOnly */, WebIDBCallbacksImpl::create(request).release());
     return request;
 }