[Extensions] Convert some SyncExtensionFunctions

chrome/browser/extensions/api/tab_capture/tab_capture_api.h

Index: chrome/browser/extensions/api/tab_capture/tab_capture_api.h
diff --git a/chrome/browser/extensions/api/tab_capture/tab_capture_api.h b/chrome/browser/extensions/api/tab_capture/tab_capture_api.h
index 884c71115772ccb8acb4d255bb1c5f6f5c1df516..8e9675f1c618a9f2dd852eab8fa9ec57cd880079 100644
--- a/chrome/browser/extensions/api/tab_capture/tab_capture_api.h
+++ b/chrome/browser/extensions/api/tab_capture/tab_capture_api.h
@@ -45,7 +45,7 @@ class TabCaptureGetCapturedTabsFunction : public ChromeSyncExtensionFunction {
   bool RunSync() final;
 };
 
-class TabCaptureCaptureOffscreenTabFunction : public SyncExtensionFunction {
+class TabCaptureCaptureOffscreenTabFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("tabCapture.captureOffscreenTab",
                              TABCAPTURE_CAPTUREOFFSCREENTAB)
@@ -59,7 +59,7 @@ class TabCaptureCaptureOffscreenTabFunction : public SyncExtensionFunction {
   ~TabCaptureCaptureOffscreenTabFunction() final {}
 
   // ExtensionFunction:
-  bool RunSync() final;
+  ResponseAction Run() final;
 };
 
 }  // namespace extensions