Added error message with stack trace and exception details if exception happened when command in console evaluate.

Review URL: https://codereview.chromium.org/369333002

git-svn-id: svn://svn.chromium.org/blink/trunk@178471 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Removed fields/methods related to gesture tap highlight flags.

This CL follows https://codereview.chromium.org/392783003 and
https://codereview.chromium.org/393653002.

BUG=350531

Review URL: https://codereview.chromium.org/396753002

git-svn-id: svn://svn.chromium.org/blink/trunk@178472 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Make target on TimelineRecord nullable

BUG=

Review URL: https://codereview.chromium.org/400143002

git-svn-id: svn://svn.chromium.org/blink/trunk@178473 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update decomposed-after-stacked-diacritics.html for subpixel

Update the fast/text/decomposed-after-stacked-diacritics.html test to
support subpixel text.

BUG=378610
R=leviw@chromium.org

Review URL: https://codereview.chromium.org/359463002

git-svn-id: svn://svn.chromium.org/blink/trunk@178474 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rename WebCore namespace to blink in Platform

TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/400543004

git-svn-id: svn://svn.chromium.org/blink/trunk@178475 bbb929c8-8fbe-4397-9dbb-9b2b20218538