DevTools: simplify the async instrumentation harness.

third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp

Index: third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp
diff --git a/third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp b/third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp
index 95f379941c1b1de7ec3a8f839e90b6e87e87bc99..80a8e3fed37f92c43a35776b82f9b82959f00c4c 100644
--- a/third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp
+++ b/third_party/WebKit/Source/modules/webdatabase/SQLStatement.cpp
@@ -53,10 +53,9 @@ SQLStatement::SQLStatement(Database* database, SQLStatementCallback* callback,
     SQLStatementErrorCallback* errorCallback)
     : m_statementCallback(callback)
     , m_statementErrorCallback(errorCallback)
-    , m_asyncOperationId(0)
 {
     if (hasCallback() || hasErrorCallback())
-        m_asyncOperationId = InspectorInstrumentation::traceAsyncOperationStarting(database->getExecutionContext(), "SQLStatement");
+        InspectorInstrumentation::asyncTaskScheduled(database->getExecutionContext(), "SQLStatement", this);
 }
 
 SQLStatement::~SQLStatement()
@@ -96,7 +95,7 @@ bool SQLStatement::performCallback(SQLTransaction* transaction)
     SQLStatementErrorCallback* errorCallback = m_statementErrorCallback.release();
     SQLErrorData* error = m_backend->sqlError();
 
-    InspectorInstrumentationCookie cookie = InspectorInstrumentation::traceAsyncOperationCompletedCallbackStarting(transaction->database()->getExecutionContext(), m_asyncOperationId);
+    InspectorInstrumentation::AsyncTask asyncTask(transaction->database()->getExecutionContext(), this);
 
     // Call the appropriate statement callback and track if it resulted in an error,
     // because then we need to jump to the transaction error callback.
@@ -107,8 +106,6 @@ bool SQLStatement::performCallback(SQLTransaction* transaction)
         callbackError = !callback->handleEvent(transaction, m_backend->sqlResultSet());
     }
 
-    InspectorInstrumentation::traceAsyncCallbackCompleted(cookie);
-
     return callbackError;
 }