Fix compilation on Chromium OS after r171165

r171165 broke compilation on Chromium OS bot and we had to revert Blink roll.
...
../../../../../../../home/chrome-bot/chrome_root/src/third_party/WebKit/Source/core/dom/CharacterData.cpp:146:36:
error: 'realCount' may be used uninitialized in this function
...
I simply added initialization for realCount variables to make the compiler happy.

[1] http://build.chromium.org/p/chromium.chromiumos/builders/ChromiumOS%20%28x86%29/builds/20955

BUG=349898
TBR=sigbjornf@opera.com

Review URL: https://codereview.chromium.org/232243004

git-svn-id: svn://svn.chromium.org/blink/trunk@171240 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert 171210 "Split the invisible-descendants-should-not-affect..."

compositing/overflow/invisible-descendants-should-not-affect-opt-in.html is broken on all platforms:

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=compositing%2Foverflow%2Finvisible-descendants-should-not-affect-opt-in.html%2Cvirtual%2Fgpu%2Fcompositedscrolling%2Foverflow%2Finvisible-descendants-should-not-affect-opt-in.html%2Cvirtual%2Fsoftwarecompositing%2Foverflow%2Finvisible-descendants-should-not-affect-opt-in.html

> Split the invisible-descendants-should-not-affect-opt-in test up.
> 
> The test does a for loop over 3 cases, checking if composited is enabled
> at all to determine if we've promoted layers. When ForceCompositingMode
> is on, we can not use this test to verify promotion. So split the
> test's 3 cases into separate tests, and each one dumps the layer tree
> so that we can verify promotion/not correctly.
> 
> R=enne@chromium.org, vollick@chromium.org
> BUG=361729
> 
> Review URL: https://codereview.chromium.org/232043002

TBR=danakj@chromium.org

Review URL: https://codereview.chromium.org/227503008

git-svn-id: svn://svn.chromium.org/blink/trunk@171241 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: Add Source/platform/heap/ to WATCHLISTS

TBR=ager@chromium.org

Review URL: https://codereview.chromium.org/232683002

git-svn-id: svn://svn.chromium.org/blink/trunk@171242 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: Move WorkerClients to the managed heap and trace its supplements.

R=ager@chromium.org
BUG=

Review URL: https://codereview.chromium.org/230083003

git-svn-id: svn://svn.chromium.org/blink/trunk@171243 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: Move FontFaceSet to the managed heap.

R=haraken@chromium.org, sigbjornf@opera.com
BUG=

Review URL: https://codereview.chromium.org/225523003

git-svn-id: svn://svn.chromium.org/blink/trunk@171244 bbb929c8-8fbe-4397-9dbb-9b2b20218538