This was a very minor issue.

https://codereview.chromium.org/2683583006/

Message: 

../../components/ntp_tiles/most_visited_sites.cc:196:7: warning: Value stored to 'num_tiles' is never read
      num_tiles = i;

Unfortunately, all remaining messages were not helpful (see  issue 686829 ).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/468141a302bc1a593c5f9ec5286e858cf3a5f465

commit 468141a302bc1a593c5f9ec5286e858cf3a5f465
Author: kmarshall <kmarshall@chromium.org>
Date: Thu Feb 09 20:24:38 2017

Fix loop early exit bug in blockfile cache Trim behavior.

This bug fixes an issue in which a "done" bool in a loop is never set
since it is reinitialized at the top of the loop body.

(Detected as a dead store by the Clang static analyzer.)

R=wez@chromium.org,msramek@chromium.org
BUG= 686838 

Review-Url: https://codereview.chromium.org/2673863003
Cr-Commit-Position: refs/heads/master@{#449392}

[modify] https://crrev.com/468141a302bc1a593c5f9ec5286e858cf3a5f465/net/disk_cache/blockfile/eviction.cc

It looks like the analyzer is finding cases where possible bad memory accesses may occur in structs with pointer fields that lack initializers.

e.g. the field "name" in base::Feature is not initialized to nullptr, and the field is not DCHECK'd for non-nullness.


Hence this warning:
../../build/linux/debian_wheezy_amd64-sysroot/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/locale_facets.tcc:1258:9: warning: Assigned value is garbage or undefined
        *__s++ = *__first++;
               ^
../../base/metrics/field_trial_params.cc:106:3: note: Taking false branch
  if (value_as_string == "true")
  ^
../../base/metrics/field_trial_params.cc:108:3: note: Taking false branch
  if (value_as_string == "false")
  ^
../../base/metrics/field_trial_params.cc:111:7: note: Assuming the condition is true
  if (!value_as_string.empty()) {
      ^~~~~~~~~~~~~~~~~~~~~~~~
../../base/metrics/field_trial_params.cc:111:3: note: Taking true branch
  if (!value_as_string.empty()) {
  ^
../../base/metrics/field_trial_params.cc:112:5: note: Assuming the condition is false
    DLOG(WARNING) << "Failed to parse field trial param " << param_name
    ^~~~~~~~~~~~~

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/13781f5c8e8f44939079dd8fd9ccfc14ba70048e

commit 13781f5c8e8f44939079dd8fd9ccfc14ba70048e
Author: stkhapugin <stkhapugin@chromium.org>
Date: Mon Feb 20 15:25:54 2017

Fixes a memory leak in bookmarks detected with static analyzer.

BUG= 686838 

Review-Url: https://codereview.chromium.org/2702273002
Cr-Commit-Position: refs/heads/master@{#451628}

[modify] https://crrev.com/13781f5c8e8f44939079dd8fd9ccfc14ba70048e/ios/chrome/browser/ui/bookmarks/bookmark_edit_view_controller.mm

Issue isn't actionable, so I'm archiving this bug. It still can be used for future fix CLs, though.