[DevTools] Make WebDevToolsAgentImpl own InspectorOverlayImpl.

Source/web/WebLocalFrameImpl.cpp

Index: Source/web/WebLocalFrameImpl.cpp
diff --git a/Source/web/WebLocalFrameImpl.cpp b/Source/web/WebLocalFrameImpl.cpp
index 084c698331fa46ef960b870d9e2bf32c0c589db6..20891bd08d4917504bfd8c57fe78caf1a7ebc32b 100644
--- a/Source/web/WebLocalFrameImpl.cpp
+++ b/Source/web/WebLocalFrameImpl.cpp
@@ -219,12 +219,10 @@
 #include "web/CompositionUnderlineVectorBuilder.h"
 #include "web/FindInPageCoordinates.h"
 #include "web/GeolocationClientProxy.h"
-#include "web/InspectorOverlayImpl.h"
 #include "web/LocalFileSystemClient.h"
 #include "web/MIDIClientProxy.h"
 #include "web/NavigatorContentUtilsClientImpl.h"
 #include "web/NotificationPermissionClientImpl.h"
-#include "web/PageOverlay.h"
 #include "web/RemoteBridgeFrameOwner.h"
 #include "web/SharedWorkerRepositoryClientImpl.h"
 #include "web/SuspendableScriptExecutor.h"
@@ -1695,7 +1693,6 @@ DEFINE_TRACE(WebLocalFrameImpl)
     visitor->trace(m_frameLoaderClientImpl);
     visitor->trace(m_frame);
     visitor->trace(m_devToolsAgent);
-    visitor->trace(m_inspectorOverlay);
     visitor->trace(m_textFinder);
     visitor->trace(m_printContext);
     visitor->trace(m_geolocationClientProxy);
@@ -2045,13 +2042,6 @@ void WebLocalFrameImpl::setDevToolsAgentClient(WebDevToolsAgentClient* devToolsC
     }
 }
 
-InspectorOverlay* WebLocalFrameImpl::inspectorOverlay()
-{
-    if (!m_inspectorOverlay)
-        m_inspectorOverlay = InspectorOverlayImpl::createEmpty();
-    return m_inspectorOverlay.get();
-}
-
 WebDevToolsAgent* WebLocalFrameImpl::devToolsAgent()
 {
     return m_devToolsAgent.get();