Remove deprecated ExecutionContextTask

third_party/WebKit/Source/core/testing/NullExecutionContext.cpp

Index: third_party/WebKit/Source/core/testing/NullExecutionContext.cpp
diff --git a/third_party/WebKit/Source/core/testing/NullExecutionContext.cpp b/third_party/WebKit/Source/core/testing/NullExecutionContext.cpp
index 7298afb36a38dcc81ce7438e68e453074e59f3db..9ee4973cd5fdae35380d228e47413e7cb0525504 100644
--- a/third_party/WebKit/Source/core/testing/NullExecutionContext.cpp
+++ b/third_party/WebKit/Source/core/testing/NullExecutionContext.cpp
@@ -4,7 +4,6 @@
 
 #include "core/testing/NullExecutionContext.h"
 
-#include "core/dom/ExecutionContextTask.h"
 #include "core/events/Event.h"
 #include "core/frame/DOMTimer.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
@@ -29,11 +28,6 @@ NullExecutionContext::NullExecutionContext()
       is_secure_context_(true),
       queue_(new NullEventQueue()) {}
 
-void NullExecutionContext::PostTask(TaskType,
-                                    const WebTraceLocation&,
-                                    std::unique_ptr<ExecutionContextTask>,
-                                    const String&) {}
-
 void NullExecutionContext::SetIsSecureContext(bool is_secure_context) {
   is_secure_context_ = is_secure_context;
 }