Revert of Add crash keys about field trial shared memory errors.

chrome/common/crash_keys.cc

Index: chrome/common/crash_keys.cc
diff --git a/chrome/common/crash_keys.cc b/chrome/common/crash_keys.cc
index e9578be2cd28c7a9cfc6df5928cde1b6d4a3a293..17791d72b0e0c5706e36fb8e17d633e1174b44cc 100644
--- a/chrome/common/crash_keys.cc
+++ b/chrome/common/crash_keys.cc
@@ -218,10 +218,6 @@ size_t RegisterChromeCrashKeys() {
     {"engine_params", crash_keys::kMediumSize},
     {"engine1_params", crash_keys::kMediumSize},
     {"engine2_params", crash_keys::kMediumSize},
-
-    // Temporary for http://crbug.com/703649.
-    {"field_trial_shmem_create_error", crash_keys::kSmallSize},
-    {"field_trial_shmem_map_error", crash_keys::kSmallSize},
   };
 
   // This dynamic set of keys is used for sets of key value pairs when gathering