Improve robustness of pageCapture.saveAsMHTML custom binding

chrome/browser/extensions/api/page_capture/page_capture_api.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/page_capture/page_capture_api.h"
 
 #include <limits>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 14 matching lines @@
 using extensions::PageCaptureSaveAsMHTMLFunction;
 using webkit_blob::ShareableFileReference;
 
 namespace SaveAsMHTML = extensions::api::page_capture::SaveAsMHTML;
 
 namespace {
 
 const char kFileTooBigError[] = "The MHTML file generated is too big.";
 const char kMHTMLGenerationFailedError[] = "Failed to generate MHTML.";
 const char kTemporaryFileError[] = "Failed to create a temporary file.";
-const char kTabClosedError[] = "Cannot find the tab for thie request.";
+const char kTabClosedError[] = "Cannot find the tab for this request.";
 
 }  // namespace
 
 static PageCaptureSaveAsMHTMLFunction::TestDelegate* test_delegate_ = NULL;
 
 PageCaptureSaveAsMHTMLFunction::PageCaptureSaveAsMHTMLFunction() {
 }
 
 PageCaptureSaveAsMHTMLFunction::~PageCaptureSaveAsMHTMLFunction() {
   if (mhtml_file_.get()) {
@@ skipping 147 matching lines @@
                                     GetProfile(),
                                     include_incognito(),
                                     &browser,
                                     NULL,
                                     &web_contents,
                                     NULL)) {
     return NULL;
   }
   return web_contents;
 }