Replacing most of web_task.h with base::Closure + base::WeakPtrFactory.

components/test_runner/spell_check_client.h

Index: components/test_runner/spell_check_client.h
diff --git a/components/test_runner/spell_check_client.h b/components/test_runner/spell_check_client.h
index 8eac3c1a97eb7043ebc04c7e4f2275b3e82995ac..978c5ba0b0625e64bbc40018cec171b48490ddfd 100644
--- a/components/test_runner/spell_check_client.h
+++ b/components/test_runner/spell_check_client.h
@@ -8,8 +8,8 @@
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "components/test_runner/mock_spell_check.h"
-#include "components/test_runner/web_task.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/web/WebSpellCheckClient.h"
@@ -31,8 +31,6 @@ class SpellCheckClient : public blink::WebSpellCheckClient {
 
   void SetDelegate(WebTestDelegate* delegate);
 
-  WebTaskList* mutable_task_list() { return &task_list_; }
-
   // blink::WebSpellCheckClient implementation.
   void spellCheck(
       const blink::WebString& text,
@@ -58,11 +56,11 @@ class SpellCheckClient : public blink::WebSpellCheckClient {
   blink::WebString last_requested_text_check_string_;
   blink::WebTextCheckingCompletion* last_requested_text_checking_completion_;
 
-  WebTaskList task_list_;
-
   TestRunner* test_runner_;
   WebTestDelegate* delegate_;
 
+  base::WeakPtrFactory<SpellCheckClient> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(SpellCheckClient);
 };