Startup crash on MSAN builds, P0, coming from recent refactoring.

https://chromium.googlesource.com/chromium/src/+log/7de58aab696e4a36f8d059252d8f92d6f5c88830/chrome/browser/ui/search/instant_controller.cc

Marc, can you please fix or revert ?

 Issue 760794  has been merged into this issue.

Detailed report: https://clusterfuzz.com/testcase?key=5949510965788672

Job Type: linux_msan_chrome
Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  InstantController::ResetInstantTab
  InstantController::ActiveTabChanged
  Browser::ActiveTabChanged
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=498409:498414

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5949510965788672

See https://github.com/google/clusterfuzz-tools for more information.

This has already been reverted: https://chromium-review.googlesource.com/643427

ClusterFuzz testcase 6554071501897728 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

ClusterFuzz testcase 5949510965788672 is still reproducing on tip-of-tree build (trunk).

Please re-test your fix against this testcase and if the fix was incorrect or incomplete, please re-open the bug. Otherwise, ignore this notification and add ClusterFuzz-Wrong label.

ClusterFuzz has detected this issue as fixed in range 498478:498515.

Detailed report: https://clusterfuzz.com/testcase?key=5949510965788672

Job Type: linux_msan_chrome
Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  InstantController::ResetInstantTab
  InstantController::ActiveTabChanged
  Browser::ActiveTabChanged
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=498409:498414
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=498478:498515

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5949510965788672

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot