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

chrome/renderer/form_manager_browsertest.cc

Index: chrome/renderer/form_manager_browsertest.cc
diff --git a/chrome/renderer/form_manager_browsertest.cc b/chrome/renderer/form_manager_browsertest.cc
index 760490700727c4d12956b7ccc50c15fa994dd388..a72b60187a14e4ac8f4b399d058090b26f5b2e41 100644
--- a/chrome/renderer/form_manager_browsertest.cc
+++ b/chrome/renderer/form_manager_browsertest.cc
@@ -812,8 +812,7 @@ TEST_F(FormManagerTest, OneLabelElementFirstControlElementDisabled) {
             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\"/>"