Add a switch to TestRunner to enable/disable mock spell checker

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 15 matching lines @@
   DCHECK(test_runner);
 }
 
 SpellCheckClient::~SpellCheckClient() {
 }
 
 void SpellCheckClient::SetDelegate(WebTestDelegate* delegate) {
   delegate_ = delegate;
 }
 
+void SpellCheckClient::SetEnabled(bool enabled) {
+  enabled_ = enabled;
+}
+
 // blink::WebSpellCheckClient
 void SpellCheckClient::spellCheck(
     const blink::WebString& text,
     int& misspelled_offset,
     int& misspelled_length,
     blink::WebVector<blink::WebString>* optional_suggestions) {
+  if (!enabled_) {
+    misspelled_offset = 0;
+    misspelled_length = 0;
+    return;
+  }
+
   // Check the spelling of the given text.
   spell_check_.SpellCheckWord(text, &misspelled_offset, &misspelled_length);
 }
 
 void SpellCheckClient::requestCheckingOfText(
     const blink::WebString& text,
     const blink::WebVector<uint32_t>& markers,
     const blink::WebVector<unsigned>& marker_offsets,
     blink::WebTextCheckingCompletion* completion) {
-  if (text.isEmpty()) {
+  if (!enabled_ || text.isEmpty()) {
     if (completion)
       completion->didCancelCheckingText();
     return;
   }
 
   if (last_requested_text_checking_completion_)
     last_requested_text_checking_completion_->didCancelCheckingText();
 
   last_requested_text_checking_completion_ = completion;
   last_requested_text_check_string_ = text;
@@ skipping 43 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