Replace some haveLoadedStyleSheets() calls with isRenderingReady()

There was a FOUC which was caused by not waiting for HTML Imports being loaded.
Document had haveLoadedStylesheetsAndImports() but that name is not attention grabbing
and misuse of haveLoadedStylesheets() lingered.

This change renames the long name with isRenderingReady() and moves
haveLoadedStyleSheets() to private so that it is not used with a wrong intention.
And fixes some wrong callsites with the new one.

TEST=import-with-element.html,import-with-style.html
BUG=358908
R=esprehn@chromium.org,abarth@chromium.org

Review URL: https://codereview.chromium.org/224973002

git-svn-id: svn://svn.chromium.org/blink/trunk@170903 bbb929c8-8fbe-4397-9dbb-9b2b20218538
RenderLayerCompositor::calculateCompositedBounds arguments are redundant

All the callers pass the same RenderLayer for both arguments.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/226313004

git-svn-id: svn://svn.chromium.org/blink/trunk@170904 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Speculative revert 170900 "Make most decoded resource logic private to Memor..."

http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.6/builds/26089

> Make most decoded resource logic private to MemoryCache
> 
> BUG=
> 
> Review URL: https://codereview.chromium.org/222413005

TBR=japhet@chromium.org

Review URL: https://codereview.chromium.org/225023016

git-svn-id: svn://svn.chromium.org/blink/trunk@170905 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Make ThreadableLoader class to use references

ExecutionContext of ThreadableLoader class can not be null.
Move to use references to make caller code safer and remove
extra null checks. Keeping the existing interfaces as is to
create a new CL for changing remaining clients of ThreadableLoader.
Makes this patch smaller and reviewable.

Review URL: https://codereview.chromium.org/204983007

git-svn-id: svn://svn.chromium.org/blink/trunk@170906 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add 4 new core/OWNERS.

Some of these folks were nominated over a month ago
but we failed to add them after the 5 days passed.  Sorry.

Review URL: https://codereview.chromium.org/220963004

git-svn-id: svn://svn.chromium.org/blink/trunk@170907 bbb929c8-8fbe-4397-9dbb-9b2b20218538