[chromium] Add inhibitDraw to CCScheduler and drop root impl to prevent background flash on tab restore

• Component: New Bugs
• Status: RESOLVED FIXED

[Nat Duca]

[chromium] Add inhibitDraw to CCScheduler and drop root impl to prevent background flash on tab restore

[Nat Duca]

Created attachment 118873 [details]
Patch

[Adrienne Walker]

Comment on attachment 118873 [details]
Patch

This all looks good to me.

[James Robinson]

Comment on attachment 118873 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=118873&action=review

R=me. have several naming nits for your consideration.

> Source/WebCore/platform/graphics/chromium/cc/CCLayerTreeHost.cpp:224
>      if (CCThreadProxy::implThread()) {
> -        TRACE_EVENT("CCLayerTreeHost::setNeedsCommit", this, 0);
>          m_proxy->setNeedsCommit();
>      } else

nit: you can drop the { }s around the 'if' clause if you want to drop this trace since it's a 1-liner now

> Source/WebCore/platform/graphics/chromium/cc/CCScheduler.cpp:108
> +CCSchedulerStateMachine::Action CCScheduler::getNextAction()

I think WebKit style would lean towards calling this 'nextAction()'

> Source/WebCore/platform/graphics/chromium/cc/CCScheduler.h:41
> +    virtual bool inhibitDraw() const = 0;

this looks like a simple getter, but might be complicated on the implementation side in the future if we get fancy about checking for tiles that are visible. if we want to anticipate that i think we might want to give this a bigger name and make it non-const. up to you, though, for now since it's a bool getter this works.

then again, we're gonna call this a whole lot so the implementation had better be really fast

> Source/WebCore/platform/graphics/chromium/cc/CCThreadProxy.cpp:434
> +    return m_layerTreeHostImpl ? !m_layerTreeHostImpl->rootLayer() : true;

hmmmm, a bit yoda-like this ternary statement appears.  perhaps phrasing this function call terms of a positive (shouldDraw(), canDraw(), something like that) would some clarity to the method provide.

[Nat Duca]

Created attachment 119316 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 119316 [details]
Patch for landing

Clearing flags on attachment: 119316

Committed r102876: <http://trac.webkit.org/changeset/102876>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.