Undisable tests that were crashy because of re-initializing WebKit:

chrome/renderer/form_manager_browsertest.cc

 // Copyright (c) 2010 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 "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/renderer/form_manager.h"
 #include "chrome/test/render_view_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDocument.h"
@@ skipping 794 matching lines @@
                       20),
             fields[1]);
   EXPECT_EQ(FormField(string16(),
                       ASCIIToUTF16("reply-send"),
                       ASCIIToUTF16("Send"),
                       ASCIIToUTF16("submit"),
                       0),
             fields[2]);
 }
 
-// Crashy, http://crbug.com/52731.
-TEST_F(FormManagerTest, DISABLED_LabelsInferredFromText) {
+TEST_F(FormManagerTest, LabelsInferredFromText) {
   LoadHTML("<FORM name=\"TestForm\" action=\"http://cnn.com\" method=\"post\">"
            "  First name:"
            "    <INPUT type=\"text\" id=\"firstname\" value=\"John\"/>"
            "  Last name:"
            "    <INPUT type=\"text\" id=\"lastname\" value=\"Smith\"/>"
            "  <INPUT type=\"submit\" name=\"reply-send\" value=\"Send\"/>"
            "</FORM>");
 
   WebFrame* web_frame = GetMainFrame();
   ASSERT_NE(static_cast<WebFrame*>(NULL), web_frame);
@@ skipping 1620 matching lines @@
 
   WebElement e = web_frame->document().getElementById("firstname");
   WebFormControlElement firstname = e.to<WebFormControlElement>();
 
   // Hidden form control element should not have a label set.
   FormManager form_manager;
   EXPECT_EQ(string16(), form_manager.LabelForElement(firstname));
 }
 
 }  // namespace