Ensure WebView notifies desktop automation on creation, destruction, and change

Ensure WebView notifies desktop automation on creation, destruction, and change

Currently, when a caller requests a desktop tree and then opens a new windowthe new WebViewmight have an unloaded child root web area because the tree id sent on construction may be stale by the time automation gets it. Adding a notification in WebView::RenderViewHostChanged appears to work properly.

This also allows ChromeVox to add one set of listeners on the desktop node.

TEST=With ChromeVox Next set to use automation,
- navigate within a tab
- switch to several tabs and navigate
- open new windows and navigate
Result should be that events fire properly when tabbing within the new page.

Committed: https://crrev.com/3475be275ec7342907a64e3e66cad085b9be8c33
Cr-Commit-Position: refs/heads/master@{#314017}

[David Tseng, 2015-01-27 21:44:31]

dtseng@chromium.org changed reviewers:
+ aboxhall@chromium.org, dmazzoni@chromium.org

[dmazzoni, 2015-01-27 21:53:45]

lgtm

https://codereview.chromium.org/880063002/diff/20001/ui/views/controls/webvie...
File ui/views/controls/webview/webview.cc (right):

https://codereview.chromium.org/880063002/diff/20001/ui/views/controls/webvie...
ui/views/controls/webview/webview.cc:283:
NotifyAccessibilityEvent(ui::AX_EVENT_LAYOUT_COMPLETE, true);
What do you think about AX_EVENT_CHILDREN_CHANGED? That seems the most logical
to me since the child of this object in the AX hierarchy is the document / web
area, and this is called when that object changes.

[aboxhall, 2015-01-27 21:58:02]

lgtm

[David Tseng, 2015-01-27 22:04:50]

dtseng@chromium.org changed reviewers:
+ sadrul@chromium.org

[David Tseng, 2015-01-27 22:04:51]

+ sadrul for u/v/c/w/webview.cc

https://codereview.chromium.org/880063002/diff/20001/ui/views/controls/webvie...
File ui/views/controls/webview/webview.cc (right):

https://codereview.chromium.org/880063002/diff/20001/ui/views/controls/webvie...
ui/views/controls/webview/webview.cc:283:
NotifyAccessibilityEvent(ui::AX_EVENT_LAYOUT_COMPLETE, true);
On 2015/01/27 21:53:45, dmazzoni wrote:
> What do you think about AX_EVENT_CHILDREN_CHANGED? That seems the most logical
> to me since the child of this object in the AX hierarchy is the document / web
> area, and this is called when that object changes.

Done.

[sadrul, 2015-01-28 00:01:27]

The failures on the trybots look related. Could you check?

[David Tseng, 2015-01-28 20:37:17]

PTAL all. I had to make more extensive changes to ChromeVox because:
- tree traversal now needs to account for the unified desktop tree (so nodes
with different roots should be accounted for when moving "next").
- since the desktop tree loads the root web areas async, we can no longer rely
on a tabs onUpdated status complete to start traversing the automation tree. We
need to listen for the actual load complete event.


On 2015/01/28 00:01:27, sadrul wrote:
> The failures on the trybots look related. Could you check?

[dmazzoni, 2015-01-28 23:05:21]

lgtm

https://codereview.chromium.org/880063002/diff/170001/chrome/browser/resource...
File
chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
(right):

https://codereview.chromium.org/880063002/diff/170001/chrome/browser/resource...
chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js:237:
/**
nit: indentation

https://codereview.chromium.org/880063002/diff/170001/ui/views/controls/webvi...
File ui/views/controls/webview/webview.cc (right):

https://codereview.chromium.org/880063002/diff/170001/ui/views/controls/webvi...
ui/views/controls/webview/webview.cc:409: #if defined(OS_CHROMEOS)
I think we should fire this event on all platforms. This code is used on Windows
now and it could be useful if any MSAA client is caching this node.

[sadrul, 2015-01-28 23:07:09]

views lgtm

[David Tseng, 2015-01-29 00:33:52]

https://codereview.chromium.org/880063002/diff/170001/chrome/browser/resource...
File
chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js
(right):

https://codereview.chromium.org/880063002/diff/170001/chrome/browser/resource...
chrome/browser/resources/chromeos/chromevox/cvox2/background/automation_util.js:237:
/**
On 2015/01/28 23:05:21, dmazzoni wrote:
> nit: indentation

Done.

https://codereview.chromium.org/880063002/diff/170001/ui/views/controls/webvi...
File ui/views/controls/webview/webview.cc (right):

https://codereview.chromium.org/880063002/diff/170001/ui/views/controls/webvi...
ui/views/controls/webview/webview.cc:409: #if defined(OS_CHROMEOS)
On 2015/01/28 23:05:21, dmazzoni wrote:
> I think we should fire this event on all platforms. This code is used on
Windows
> now and it could be useful if any MSAA client is caching this node.


Was getting various test failures specific to Windows; can investigate this in a
follow up. Will try to fix while I resolve the other test issues if it looks
trivial.

[David Tseng, 2015-01-29 00:39:51]

dtseng@chromium.org changed reviewers:
+ sky@chromium.org

[David Tseng, 2015-01-29 00:40:29]

+ sky for chrome/test

[sky, 2015-01-29 02:52:07]

LGTM

[David Tseng, 2015-01-30 18:58:13]

Patchset #19 (id:350001) has been deleted

[David Tseng, 2015-01-30 18:58:30]

Patchset #19 (id:370001) has been deleted

[David Tseng, 2015-01-30 18:58:46]

Patchset #20 (id:400001) has been deleted

[David Tseng, 2015-01-30 18:59:00]

Patchset #19 (id:330002) has been deleted

[David Tseng, 2015-01-30 18:59:13]

Patchset #18 (id:330001) has been deleted

[David Tseng, 2015-01-30 18:59:26]

Patchset #17 (id:310001) has been deleted

[David Tseng, 2015-01-30 18:59:38]

Patchset #17 (id:420001) has been deleted

[David Tseng, 2015-01-30 18:59:51]

Patchset #16 (id:290001) has been deleted

[David Tseng, 2015-01-30 22:23:46]

The CQ bit was checked by dtseng@chromium.org

[commit-bot: I haz the power, 2015-01-30 22:24:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/880063002/510001

[commit-bot: I haz the power, 2015-01-30 23:03:43]

Committed patchset #20 (id:510001)

[commit-bot: I haz the power, 2015-01-30 23:04:48]

Patchset 20 (id:??) landed as
https://crrev.com/3475be275ec7342907a64e3e66cad085b9be8c33
Cr-Commit-Position: refs/heads/master@{#314017}

[please use gerrit instead, 2015-01-31 01:53:46]

A revert of this CL (patchset #20 id:510001) has been created in
https://codereview.chromium.org/887203002/ by rouslan@chromium.org.

The reason for reverting is: Broke interactive_ui_tests on Linux Chromium OS
ASan LSan Tests bot.

TestAsNormalAndGuestUser/SpokenFeedbackTest.EnableSpokenFeedback/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.EnableSpokenFeedback/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.FocusToolbar/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.FocusToolbar/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.TouchExploreStatusTray/0
GuestSpokenFeedbackTest.FocusToolbar
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxPrefixKey/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxPrefixKey/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.OverviewMode/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.OverviewMode/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.NavigateSystemTray/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.NavigateSystemTray/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxNavigateAndSelect/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.VolumeSlider/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.VolumeSlider/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxNavigateAndSelect/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxShiftSearch/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.TouchExploreStatusTray/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.TypeInOmnibox/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.TypeInOmnibox/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.OpenStatusTray/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.OpenStatusTray/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxShiftSearch/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.NavigateAppLauncher/1
TestAsNormalAndGuestUser/SpokenFeedbackTest.NavigateAppLauncher/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.FocusShelf/0
TestAsNormalAndGuestUser/SpokenFeedbackTest.FocusShelf/1

Example test output:

TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxPrefixKey/0 (run #1):
[ RUN      ] TestAsNormalAndGuestUser/SpokenFeedbackTest.ChromeVoxPrefixKey/0
[5662:5662:0130/162946:ERROR:browser_main_loop.cc(171)] Running without the SUID
sandbox! See https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment
for more information on developing with the sandbox on.
[5662:5662:0130/162946:WARNING:chrome_browser_main_chromeos.cc(290)] Running as
stub user with profile dir: test-user
[5662:5662:0130/162946:INFO:audio_manager_pulse.cc(258)] Failed to connect to
the context.  Error: Connection refused
Xlib:  extension "RANDR" missing on display ":9".
[5662:5691:0130/162946:ERROR:owner_key_util_impl.cc(27)] Could not get size of
/tmp/.org.chromium.Chromium.2P0kWj/dmjRgRA/stub_owner.key
[5662:5691:0130/162946:WARNING:local_extension_cache.cc(199)] Extensions will
not be installed from update URLs until /var/cache/external_cache/.initialized
exists.
[5662:5662:0130/162946:WARNING:data_reduction_proxy_settings.cc(345)] SPDY proxy
OFF at startup
[5662:5673:0130/162946:WARNING:freezer_cgroup_process_manager.cc(58)] Cgroup
freezer does not exist or is not writable. Unable to freeze renderer processes.
[5698:5698:0130/162946:ERROR:renderer_main.cc(205)] Running without renderer
sandbox
[5708:5708:0130/162947:ERROR:renderer_main.cc(205)] Running without renderer
sandbox
[5662:5662:0130/162948:INFO:CONSOLE(0)] "Synchronous XMLHttpRequest on the main
thread is deprecated because of its detrimental effects to the end user's
experience. For more help, check http://xhr.spec.whatwg.org/.", source:  (0)
[5662:5662:0130/162949:INFO:CONSOLE(2069)] "Uncaught TypeError: Cannot read
property 'appendChild' of null", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(2069)
[5708:5708:0130/162949:WARNING:logging_native_handler.cc(62)] 43 is not in the
cache and not the new root.
[5708:5708:0130/162949:WARNING:logging_native_handler.cc(62)] unserialization
failed
[5662:5662:0130/162950:INFO:CONSOLE(2020)] "Starting ChromeVox.", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVoxChromePageScript.js
(2020)
[5662:5662:0130/162950:INFO:CONSOLE(1235)] "Uncaught TypeError: Cannot read
property 'query' of undefined", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVoxChromePageScript.js
(1235)
[5662:5662:0130/162950:INFO:CONSOLE(0)] "calling getTree() callback", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/cvox2/background/background.html
(0)
[5662:5662:0130/162950:INFO:CONSOLE(1453)] "Speak (Q) "ChromeVox spoken feedback
is ready"", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162950:INFO:CONSOLE(2197)] "Injecting into 2", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(2197)
[5662:5662:0130/162950:INFO:CONSOLE(0)] "calling getTree() callback", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/cvox2/background/background.html
(0)
[5662:5662:0130/162951:INFO:CONSOLE(2020)] "Starting ChromeVox.", source:
chrome-extension://chromevox/chromeVoxChromePageScript.js (2020)
[5662:5662:0130/162951:INFO:CONSOLE(0)] "Synchronous XMLHttpRequest on the main
thread is deprecated because of its detrimental effects to the end user's
experience. For more help, check http://xhr.spec.whatwg.org/.", source:  (0)
[5662:5662:0130/162951:INFO:CONSOLE(1252)] "Warning: ChromeVox external script
loading for
data:text/html;charset=utf-8,\u003Cscript>window.setInterval(function() {  try {
   cvox.Api.speak('ready');  } catch (e) {}}, 100);\u003C/script> stopped after
failing to install
https://ssl.gstatic.com/accessibility/javascript/ext/loader.js", source:
chrome-extension://chromevox/chromeVoxChromePageScript.js (1252)
[5662:5662:0130/162951:INFO:CONSOLE(1453)] "Speak (Q) "ready"", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162951:INFO:CONSOLE(1454)] "  using endCallback", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1454)
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_card_driver
returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_concat returned
error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_refer returned
error: No such file or directory
ALSA lib conf.c:4720:(snd_config_expand) Evaluate error: No such file or
directory
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default
[5662:5667:0130/162951:WARNING:alsa_util.cc(24)] PcmOpen: default,No such file
or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_card_driver
returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_concat returned
error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4241:(_snd_config_evaluate) function snd_func_refer returned
error: No such file or directory
ALSA lib conf.c:4720:(snd_config_expand) Evaluate error: No such file or
directory
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM default
[5662:5667:0130/162951:WARNING:alsa_util.cc(24)] PcmOpen: plug:default,No such
file or directory
[5662:5662:0130/162951:INFO:CONSOLE(2189)] "Earcon TASK_SUCCESS", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(2189)
[5662:5662:0130/162951:INFO:CONSOLE(2020)] "Starting ChromeVox.", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVoxChromePageScript.js
(2020)
[5662:5662:0130/162951:INFO:CONSOLE(0)] "Synchronous XMLHttpRequest on the main
thread is deprecated because of its detrimental effects to the end user's
experience. For more help, check http://xhr.spec.whatwg.org/.", source:  (0)
[5662:5662:0130/162951:INFO:CONSOLE(2303)] "processing load complete!", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(2303)
[5662:5662:0130/162951:INFO:CONSOLE(1453)] "Speak (Q) category=nav "Click me"",
source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162951:INFO:CONSOLE(1453)] "  using startCallback", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162951:INFO:CONSOLE(1453)] "Speak (Q) category=nav "Button"",
source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162951:INFO:CONSOLE(1454)] "  using endCallback", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1454)
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_PRESSED
 Key code: 17, Flags: 1048580, Is char: 0
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_PRESSED
 Key code: 186, Flags: 1048580, Is char: 0
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_RELEASED
 Key code: 186, Flags: 1048580, Is char: 0
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_RELEASED
 Key code: 17, Flags: 1048576, Is char: 0
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_PRESSED
 Key code: 191, Flags: 1048576, Is char: 0
[5662:5662:0130/162951:INFO:touch_exploration_controller.cc(62)]
Keyboard event: ET_KEY_RELEASED
 Key code: 191, Flags: 1048576, Is char: 0
[5662:5662:0130/162951:INFO:CONSOLE(1252)] "Warning: ChromeVox external script
loading for data:text/html;charset=utf-8,\u003Cbutton autofocus>Click
me\u003C/button> stopped after failing to install
https://ssl.gstatic.com/accessibility/javascript/ext/loader.js", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVoxChromePageScript.js
(1252)
[5662:5662:0130/162952:INFO:CONSOLE(1455)] "Stop", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1455)
[5662:5662:0130/162952:INFO:CONSOLE(1455)] "Stop", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1455)
[5662:5662:0130/162952:INFO:CONSOLE(1455)] "Stop", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1455)
[5662:5662:0130/162952:INFO:CONSOLE(1453)] "Speak (I) "Find in page."", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162952:INFO:CONSOLE(1453)] "Speak (Q) ", "", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162952:INFO:CONSOLE(1453)] "Speak (Q) "Enter a search query."",
source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(1453)
[5662:5662:0130/162952:INFO:CONSOLE(2189)] "Earcon OBJECT_OPEN", source:
chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromeVox2ChromeBackgroundScript.js
(2189)

=================================================================
==5662==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 48 byte(s) in 1 object(s) allocated from:
    #0 0x4d9e69 in operator new(unsigned long)
(/tmp/run_tha_testJgo5Vp/out/Release/interactive_ui_tests+0x4d9e69)
    #1 0x2bf0069 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:449:7
    #2 0x2be4653 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChanges(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:329:3
    #3 0x2be2def in AutomationManagerAsh::SendEvent(content::BrowserContext*,
views::AXAuraObjWrapper*, ui::AXEvent)
chrome/browser/ui/ash/accessibility/automation_manager_ash.cc:114:3
    #4 0x2be3314 in AutomationManagerAsh::HandleEvent(content::BrowserContext*,
views::View*, ui::AXEvent)
chrome/browser/ui/ash/accessibility/automation_manager_ash.cc:63:3
    #5 0x21b9486 in views::View::NotifyAccessibilityEvent(ui::AXEvent, bool)
ui/views/view.cc:1277:5
    #6 0x92bc0de in views::WebView::GetWebContents()
ui/views/controls/webview/webview.cc:52:5
    #7 0x2bf55c9 in AXTreeSourceAsh::SerializeNode(views::AXAuraObjWrapper*,
ui::AXNodeData*) const
chrome/browser/ui/ash/accessibility/ax_tree_source_ash.cc:104:9
    #8 0x2befa22 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:419:3
    #9 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #10 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #11 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #12 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #13 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #14 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #15 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #16 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #17 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #18 0x2bf08f9 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChangedNodes(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:460:5
    #19 0x2be4653 in
ui::AXTreeSerializer\u003Cviews::AXAuraObjWrapper*>::SerializeChanges(views::AXAuraObjWrapper*,
ui::AXTreeUpdate*) ui/accessibility/ax_tree_serializer.h:329:3
    #20 0x2be2def in AutomationManagerAsh::SendEvent(content::BrowserContext*,
views::AXAuraObjWrapper*, ui::AXEvent)
chrome/browser/ui/ash/accessibility/automation_manager_ash.cc:114:3
    #21 0x2be2acf in AutomationManagerAsh::Enable(content::BrowserContext*)
chrome/browser/ui/ash/accessibility/automation_manager_ash.cc:33:3
    #22 0xd275b4b in extensions::AutomationInternalEnableDesktopFunction::Run()
chrome/browser/extensions/api/automation_internal/automation_internal_api.cc:357:3
    #23 0xaaeae8d in
extensions::ExtensionFunctionDispatcher::DispatchWithCallbackInternal(ExtensionHostMsg_Request_Params
const&, content::RenderViewHost*, content::RenderFrameHost*,
base::Callback\u003Cvoid (ExtensionFunction::ResponseType, base::ListValue
const&, std::string const&)> const&)
extensions/browser/extension_function_dispatcher.cc:400:5
    #24 0xaaea20f in
extensions::ExtensionFunctionDispatcher::Dispatch(ExtensionHostMsg_Request_Params
const&, content::RenderViewHost*)
extensions/browser/extension_function_dispatcher.cc:314:3
    #25 0xaada7c4 in OnRequest extensions/browser/extension_host.cc:353:3
    #26 0xaada7c4 in DispatchToMethodImpl\u003Cextensions::ExtensionHost, void
(extensions::ExtensionHost::*)(const ExtensionHostMsg_Request_Params &),
ExtensionHostMsg_Request_Params, 0> base/tuple.h:246
    #27 0xaada7c4 in DispatchToMethod\u003Cextensions::ExtensionHost, void
(extensions::ExtensionHost::*)(const ExtensionHostMsg_Request_Params &),
ExtensionHostMsg_Request_Params> base/tuple.h:253
    #28 0xaada7c4 in Dispatch\u003Cextensions::ExtensionHost,
extensions::ExtensionHost, void, void (extensions::ExtensionHost::*)(const
ExtensionHostMsg_Request_Params &)> extensions/common/extension_messages.h:582
    #29 0xaada7c4 in extensions::ExtensionHost::OnMessageReceived(IPC::Message
const&) extensions/browser/extension_host.cc:341
    #30 0x44246c4 in
content::WebContentsImpl::OnMessageReceived(content::RenderViewHost*,
content::RenderFrameHost*, IPC::Message const&)
content/browser/web_contents/web_contents_impl.cc:491:11
    #31 0x42d099d in content::RenderViewHostImpl::OnMessageReceived(IPC::Message
const&) content/browser/renderer_host/render_view_host_impl.cc:878:7
    #32 0x42b2f8a in
content::RenderProcessHostImpl::OnMessageReceived(IPC::Message const&)
content/browser/renderer_host/render_process_host_impl.cc:1529:10
    #33 0x3ff6060 in IPC::ChannelProxy::Context::OnDispatchMessage(IPC::Message
const&) ipc/ipc_channel_proxy.cc:282:3

-----------------------------------------------------
Suppressions used:
  count      bytes template
      9        736 libfontconfig
      1         24 libnssutil3
-----------------------------------------------------

SUMMARY: AddressSanitizer: 48 byte(s) leaked in 1 allocation(s)

http://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20....