GitLab

As a side effect, this makes ctrl+click on a submit button open
a new background tab - similar to webkit and clicking on a link.

Also covered ctrl+click functionality with tests.

Bug: 849055
Change-Id: I344df4821a7c840129d239023d4a500a42e8f80b
Reviewed-on: https://chromium-review.googlesource.com/1100107Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567422}

"Drag" is for dragging window on the title area.
"Resize" is for resizing snapped windows by dragging the divider bar in
splitscreen.

Bug: None
Change-Id: I8b768cf0286615c1ca0e925eee0295def2bf7ffe
Reviewed-on: https://chromium-review.googlesource.com/1091928Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567421}

If the user clicks the Install button after ARC++ is provisioned, we should
start the flow right away. If not, we delay the flow until Play Store is ready.

ARC++ changes: ag/4174872

Bug: 835029
Change-Id: I36037df522addd9aec3f525157e2e5478c9d4836
Reviewed-on: https://chromium-review.googlesource.com/1080012Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Yue Cen <rsgingerrs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567420}

* wasm_local_iframe_test doesn't appear to be flaky anymore
* The wasm WPT tests all require the --enable-wasm flag, so must be run
  in the virtual/enable_wasm/ testsuite

Bug: 736732
Change-Id: I6076a5aecdfb018ad81130721062955e2ede8d5c
Reviewed-on: https://chromium-review.googlesource.com/1100078Reviewed-by: Derek Schuff <dschuff@chromium.org>
Commit-Queue: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567419}

Having addressed all known stability issues on Mac, updates Mac enable
rate to be at parity with Windows.

Bug: 531673
Change-Id: I941d2a6d91fcc3272cdd64c98b1af6358301ea8a
Reviewed-on: https://chromium-review.googlesource.com/1101175Reviewed-by: Leonard Grey <lgrey@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Mike Wittman <wittman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567418}

Most clients only need private memory footprint, but the existing methods would
still query all the MemoryDumpProviders and then filter the results. This CL
adds a new method that avoids querying MemoryDumpProviders.

Bug: 851712
Change-Id: I269be2b5a74c32205ba6f4087a9bb8affb9cffb6
Reviewed-on: https://chromium-review.googlesource.com/1098623Reviewed-by: Primiano Tucci <primiano@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567417}

This reverts commit e17dbaf1.

Reason for revert: Compile failure https://crbug.com/852958

Original change's description:
> Make base::ScopedZxHandle a zx::handle.
> 
> - Add the ScopedZxHandle APIs to the base zx::handle.
> - Add missing includes.
> 
> This allows ScopedZxHandle to be removed incrementally from call-sites.
> 
> Bug: 852541
> Change-Id: Idc452a450ce2bbe1266e9e0ee266115e2ea38f97
> Reviewed-on: https://chromium-review.googlesource.com/1100132
> Commit-Queue: Wez <wez@chromium.org>
> Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
> Reviewed-by: Ken Rockot <rockot@chromium.org>
> Reviewed-by: Gabriel Charette <gab@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#567382}

TBR=wez@chromium.org,gab@chromium.org,rockot@chromium.org,kmarshall@chromium.org

Change-Id: I44b3be92d12a29a972ca3c59d3356f97b21292f2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 852541
Reviewed-on: https://chromium-review.googlesource.com/1101777Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567416}

ATM Keyframe::PropertySpecificKeyframe::PropertySpecificKeyframe is
implemented in keyframe_effect_model.cc, not keyframe.cc. Move it there
for better readability.

Change-Id: I5f103d03e6c8bc658a486dc4a9cdb3011adb6050
Reviewed-on: https://chromium-review.googlesource.com/1101476Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567415}

Similarly to content_shell, deploys headless_shell as a zip archive.

Bug: 851125
Change-Id: Ie5403eb8912dcd1556c87b5da33b5552fa8c7d50
Reviewed-on: https://chromium-review.googlesource.com/1099759Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Commit-Queue: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567414}

The layout test times out when hit test fails, making it hard to debug.
Hence, this patch makes it not time out when failing.

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I236c73783294086684d2fc71dc85ac71b8af4df2
Reviewed-on: https://chromium-review.googlesource.com/1101637
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567413}

This CL adds persistence for journal data, and unittest for it.

Bug: 831633
Change-Id: I5d4d2821a595dc4be4d937ffd5d04ac4a79051c6
Reviewed-on: https://chromium-review.googlesource.com/1092411
Commit-Queue: Gang Wu <gangwu@chromium.org>
Reviewed-by: Filip Gorski <fgorski@chromium.org>
Reviewed-by: Sky Malice <skym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567412}

Need to roll in this commit to fix a breakage caused by META.yml:
https://github.com/web-platform-tests/wpt/pull/11486

Update WPTWhiteList due to the moving of third-party libs and a new
dependency (webencodings)

Change-Id: I67e270c9caa1c0efb3a80dd9f130c42f4f88c464
Reviewed-on: https://chromium-review.googlesource.com/1101503Reviewed-by: Robert Ma <robertma@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567411}

This CL is in addition to
https://chromium-review.googlesource.com/c/chromium/src/+/1099193, and
fixes another case where an Optional<TouchAction> might have novalue.

Bug: 824774
Change-Id: I21d18fa682d3de4cea7b54572f0bbef92eb9e6ca
Reviewed-on: https://chromium-review.googlesource.com/1101478Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567410}

This CL moves the generic portions of the Huffman encoded HSTS trie to
a separate directory. This is in preparation for future work that will
reuse these bits to store the top domain list.

Bug: 843361
Change-Id: I9a715b3f0a1fd196df19de02696b3c7fb772be0a
Reviewed-on: https://chromium-review.googlesource.com/1097549Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Reviewed-by: Nick Harper <nharper@chromium.org>
Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567409}

Refresh is a project to redesign the core UI, primarily the tapstrip's
height and shape. The result is that popup windows are slightly taller
because of some added frame padding. This patch makes the test
checking for the height of the window more lenient.

Bug: 846410
Change-Id: If62e8076d78477b82b80f13d19c0838b32f9ea64
Reviewed-on: https://chromium-review.googlesource.com/1100386
Commit-Queue: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567408}

Bug: 783309
Change-Id: I3d179e286bd82b3fb6f4c63e0c3eb9a64aaa5f68
Reviewed-on: https://chromium-review.googlesource.com/1097410
Commit-Queue: Greg Kraynov <kraynov@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567407}

Since property tree builder makes assumptions about scrolling things
being snapped elsewhere, just have it snap scrollable things itself.
Use the Layer only to snap TextureLayers.

R=enne@chromium.org

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ia47bcaa252c6bdf58b276a7ff0bcde8de0af594e
Reviewed-on: https://chromium-review.googlesource.com/1100005Reviewed-by: enne <enne@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567406}

Part of a larger effort to use Fuchsia native zx::channel objects
for smoother integration with FIDL types and API calls.


Bug: 852541
Change-Id: I095e17b98a334964e72cbb97dc7ea4dbded67ec8
Reviewed-on: https://chromium-review.googlesource.com/1101413
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567405}

RenderMessageFilter used to be responsible for cloning session storage
namespaces, but that is no longer the case, so remove these leftover
bits of code.

Bug: none
Change-Id: I382be562164851a8b00601661635e76495bbcbb2
Reviewed-on: https://chromium-review.googlesource.com/1099997Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567404}

This Cl also corrects the indent in FinishCollection().

Bug: 851163
Change-Id: I77b255b2f9191979bca02f5453d54fc8bd1e36ee
Reviewed-on: https://chromium-review.googlesource.com/1101406Reviewed-by: Mike Wittman <wittman@chromium.org>
Commit-Queue: Xi Cheng <chengx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567403}

Fallback style (background and text colors) will be returned for tiles with missing or small icons (i.e. where only a 1x icon is available when 2x is needed). This will be used to display a fallback monogram in the frontend.

Bug: 837798
Change-Id: I9e80d763085ea5b095787f83e5d1e38b801c83eb
Reviewed-on: https://chromium-review.googlesource.com/1096670
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567402}

After https://chromium-review.googlesource.com/1075947, quoting is
never needed with the hermetic msvc toolchain, so let's make the
build command a tiny bit nicer in that scenario.

Bug: 640000,439949
Change-Id: I22e3470057b43fb6a5df3f675bc95a7d84dce9c9
Reviewed-on: https://chromium-review.googlesource.com/1101557
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567401}

cr-merge is blocked:
https://eureka-internal-review.git.corp.google.com/c/chromium/src/+/179137

GN target "for_mixer_audio" introduces un-implemented interface to
chromecast devices, which breaks the build.

Bug: 110113636
Test: local build
Change-Id: I13f73eead3bbd889ef3fe10714951ce1e9a20008
Reviewed-on: https://chromium-review.googlesource.com/1100173Reviewed-by: Simeon Anfinrud <sanfin@chromium.org>
Reviewed-by: Stephen Lanham <slan@chromium.org>
Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Commit-Queue: Linkun Chen <lkchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567400}

This CL simplifies returned resources in RenderWidgetHostViewAndroid to
better match how resources are returned on other platforms. Android did
a lot of weird things that are incompatible with OOP-D and surface
synchronization that worked fine assuming synchronous operations.

Bug: 672962
Change-Id: Ibc980a0639752e126cbea9a44cb9df5ecc6e589a
Reviewed-on: https://chromium-review.googlesource.com/1101409Reviewed-by: Saman Sami <samans@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Fady Samuel <fsamuel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567399}

This change adds CanvasResourceProviderSharedBitmap, and uses it
for composited software rendering use cases.

TBR=zmo@chromium.org

Bug: 788439
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_layout_tests_slimming_paint_v2;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ibb4ea4c33ab152efac9de8ba302b055b7f830aec
Reviewed-on: https://chromium-review.googlesource.com/1099727
Commit-Queue: Justin Novosad <junov@chromium.org>
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567398}

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I4aeecfada142ad85b575703a4a9ed66c4228714b
Reviewed-on: https://chromium-review.googlesource.com/1101326
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567397}

Prior to this CL, we plumbed a lot of properties through RenderFrameMetadata that
were irrelevant to non-Android platforms. This CL reduces overhead on other platforms
by using the EnableIf decorator on fields in render_frame_metadata.mojom and
if defines in the render_frame_metadata.cc/h.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I7b4bb58983ff641aa61ccde3a33f86cc12ec1ebc
Bug: 672962
Reviewed-on: https://chromium-review.googlesource.com/1101061
Commit-Queue: Fady Samuel <fsamuel@chromium.org>
Reviewed-by: Saman Sami <samans@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567396}

Currently, if a page with an OOPIF navigates cross-process, we
immediately destroy the OOPIF's RenderFrameHost when its parent
commits (see FrameTreeNode::ResetForNewProcess()).  The RFH
destruction triggers a message to the renderer to delete the
RenderFrame, which also causes it to run its unload handler.  However,
if the subframe was the last active frame in its process, the process
will proceed to shut down without waiting for the unload handler to
run at all, and in such a case, the subframe unload handler won't
really be able to do anything, including termination pings.

This CL fixes this by delaying subframe process shutdown in such
situations by one second (which matches the existing unload timeout
that we use for pending delete RenderFrameHosts).

Bug: 852204, 609963
Change-Id: I142ef4e6f59df465c6ed213df02daf492e989c2d
Reviewed-on: https://chromium-review.googlesource.com/1094917Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567395}

Also add a tooltip to PIN keyboard back button.

Test: manual
Bug: 848681, 845871
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ic1ba4e80ee2386ffe587ffd4bc791a29548e7254
Reviewed-on: https://chromium-review.googlesource.com/1095649Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567394}

******************************Resource Sizes Diff******************************
Monochrome.apk_Dex
    +1,789 entries fields
    +2,466 entries methods
      +611 entries types
    +1,220 entries strings
Monochrome.apk_Breakdown (+173,917 bytes)
    +1,555 bytes Zip Overhead
    +1,525 bytes Non-compiled Android resources size
   +16,612 bytes Native code size
      +186 bytes Package metadata size
  +150,387 bytes Java code size
    +3,652 bytes Compiled Android resources size
Monochrome.apk_Specifics
  +535,429 bytes normalized apk size
        +3 zip entries file count
   +16,612 bytes main lib size
  +361,512 bytes main dex size

R=pnoland@chromium.org

Change-Id: Id7531d3ecf34b063a444d0f12601b287ba21cbe7
Reviewed-on: https://chromium-review.googlesource.com/1101463Reviewed-by: Patrick Noland <pnoland@chromium.org>
Commit-Queue: Pavel Yatsuk <pavely@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567393}

This test is flaky in CrOS VMs:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel/14479
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel/14493

Flakiness dashboard is quite black:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=base_unittests&tests=ThreadTicks.ThreadNow

Bug: 352633, 840967
Change-Id: Ia6efb4070bcef525992015f766599846a13ee1ec
Reviewed-on: https://chromium-review.googlesource.com/1101412Reviewed-by: Gabriel Charette <gab@chromium.org>
Commit-Queue: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567392}

Also suppress them when the RestoreOnStartup policy has a recommended
value that is overridden with a user-provided value.

BUG=824059

Change-Id: I586411b9fded82841e174468cb830604b7121906
Reviewed-on: https://chromium-review.googlesource.com/1100755
Commit-Queue: Greg Thompson <grt@chromium.org>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567391}

GCM and content suggestions (ntp_snippets) were previously not included.
This makes the test more complete.

Bug: 845310
Change-Id: I0194d74f164951c498220ec86268ca3312a6dc29
Reviewed-on: https://chromium-review.googlesource.com/1087821Reviewed-by: Filip Gorski <fgorski@chromium.org>
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567390}

Bug: 852577
Change-Id: I092cf8b80fba521725e24425e2e110937af2e222
Reviewed-on: https://chromium-review.googlesource.com/1100010
Commit-Queue: Jian Li <jianli@chromium.org>
Reviewed-by: Peter Williamson <petewil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567389}

The switch to lld as linker means that is_win_fastlink is no longer
applicable, and manually selecting lld as the linker is no longer
necessary.

Change-Id: I9c4c815d2b8834223b98fa3de72ab937b910929f
Reviewed-on: https://chromium-review.googlesource.com/1101479Reviewed-by: Reid Kleckner <rnk@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567388}

The BOM was added back in Dec 2012 [1] because it said the CWS wanted
it in its files.  However, I haven't seen this requirement in the last
few years with my own extensions (uploaded plenty w/out BOMs and the
localization still works), and our public docs [2] don't mention it.
Drop the BOM to shrink (slightly) the files and to make it easier
for other JSON parsers to handle this (as not all skip the BOM).

Further, reading the CWS source directly indicates it is not required
and is silently ignored.  See CrxMessagesParserImpl.java:parse() which
loads the JSON data through ManifestSanitizerUtil.sanitize(), and that
ManifestSanitizerUtil.java:sanitize function simply does:
  // The incoming manifest may have a byte-order marker (0xFEFF) to denote
  // Unicode as its first character.  Although it's not allowed in pure JSON,
  // we remove it here so parse just works
  if (content.charAt(0) == Constants.UNICODE_BYTE_ORDER_MARK) {
    content = content.substring(1);
  }
  return content;

Url-1: https://codereview.chromium.org/11557029
Url-2: https://developer.chrome.com/extensions/i18n-messages
Bug: 852585
Change-Id: I65f61eecb1147cd4c05f3a7a2295bef85023cb65
Reviewed-on: https://chromium-review.googlesource.com/1101239Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567387}

The GetTransformNode() method is removed, as it is only safe to use
in certain cases, and just wraps a call to get the node from the
property tree, just do it directly in the callers.

R=weiliangc@chromium.org

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Change-Id: I6f242f60209c6d9e3d603cfcf60f59ecafc8f523
Reviewed-on: https://chromium-review.googlesource.com/1099765Reviewed-by: weiliangc <weiliangc@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567386}

Added inline installation deprecation warning

Bug: none
Change-Id: I73bf87daaef7d78c3778b2f10e342e7ff32feff2
Reviewed-on: https://chromium-review.googlesource.com/1100074Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Crystal Lambert <crystallambert@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567385}

This adds documentation that explains users must
allow file:// urls through extension management page

Bug: 850693
Change-Id: I214bd285c076babb4ba6a7769db4d4a9c54c1916
Reviewed-on: https://chromium-review.googlesource.com/1093257Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Crystal Lambert <crystallambert@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567384}

This prevents spurious trace events from the empty document created
before navigation begins.

Also annotate trace events with the frame they correspond to, combine
score and max distance into a single TracedValue, and change trace
category to "loading".

Bug: 581518
Change-Id: I9ee8005596245ad31c78a8556ec837e2ef999d24
Reviewed-on: https://chromium-review.googlesource.com/1101245Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Commit-Queue: Steve Kobes <skobes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567383}