Fix fallback font instantiation for non-sandboxed mode

The fix for font fallback instantiation in r176765 works inside
the sandbox, however this broke it for the case where the sandbox
is inactive.

BUG=285303
R=eae,eseidel

Review URL: https://codereview.chromium.org/341303006

git-svn-id: svn://svn.chromium.org/blink/trunk@176977 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] Mimic pageScaleFactor settings from Android when emulating viewport.

BUG=384563,377501

Review URL: https://codereview.chromium.org/350853003

git-svn-id: svn://svn.chromium.org/blink/trunk@176978 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of DevTools: fight responsive design-related paint storms. (https://codereview.chromium.org/346213002/)

Reason for revert:
This breaks drawer resizing.

Original issue's description:
> DevTools: fight responsive design-related paint storms.
> This also adds missing flex to the tabbed-pane that I think is Ok to fix in a generic manner. Wdyt?
> R=dgozman,vsevik
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176925

TBR=dgozman@chromium.org,vsevik@chromium.org,pfeldman@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/355033002

git-svn-id: svn://svn.chromium.org/blink/trunk@176979 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: revealer should bring frontend host to front

This patch changes revealer to bring frontend host to front.
This is important for Media Query Inspector revealing functionality when
devtools are in undocked state.

R=dgozman, pfeldman

Review URL: https://codereview.chromium.org/350553003

git-svn-id: svn://svn.chromium.org/blink/trunk@176980 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Refactor heap snapshot showHiddenData

Also make class aggregates builder and class nodes provider use the same filter.

Review URL: https://codereview.chromium.org/350463003

git-svn-id: svn://svn.chromium.org/blink/trunk@176981 bbb929c8-8fbe-4397-9dbb-9b2b20218538