Make WebSpellCheckClient aware of leak detection

components/test_runner/spell_check_client.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/test_runner/spell_check_client.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 78 matching lines @@
   last_requested_text_check_string_ = text;
   if (spell_check_.HasInCache(text))
     FinishLastTextCheck();
   else
     delegate_->PostDelayedTask(
         new WebCallbackTask(base::Bind(&SpellCheckClient::FinishLastTextCheck,
                                        weak_factory_.GetWeakPtr())),
         0);
 }
 
+void SpellCheckClient::cancelAllPendingRequests() {
+  if (!last_requested_text_checking_completion_)
+    return;
+  last_requested_text_checking_completion_->didCancelCheckingText();
+  last_requested_text_checking_completion_ = nullptr;
+}
+
 void SpellCheckClient::FinishLastTextCheck() {
   if (!last_requested_text_checking_completion_)
     return;
   std::vector<blink::WebTextCheckingResult> results;
   int offset = 0;
   base::string16 text = last_requested_text_check_string_;
   if (!spell_check_.IsMultiWordMisspelling(blink::WebString(text), &results)) {
     while (text.length()) {
       int misspelled_position = 0;
       int misspelled_length = 0;
@@ skipping 17 matching lines @@
                                            &results);
   }
   last_requested_text_checking_completion_->didFinishCheckingText(results);
   last_requested_text_checking_completion_ = 0;
 
   if (test_runner_->shouldDumpSpellCheckCallbacks())
     delegate_->PrintMessage("SpellCheckEvent: FinishLastTextCheck\n");
 }
 
 }  // namespace test_runner