Use the return value to signal success for VTTParser helpers

Convert functions on the form:

ValueType f(..., bool& success);

to the form:

bool f(..., ValueType& value);

Since the latter form tend to integrate more naturally in a
success/failure parsing scheme.
Make sure that the output value is not touched unless parsing was
successful.
Perform some (minor) simplifications due to this change.

Also simplify the check for a trailing '%' in parseFloatPercentageValue.

BUG=305317

Review URL: https://codereview.chromium.org/104713002

git-svn-id: svn://svn.chromium.org/blink/trunk@163248 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove bindings.gyp since it's not referenced from anywhere

BUG=none
R=haraken@chromium.org

Review URL: https://codereview.chromium.org/106343002

git-svn-id: svn://svn.chromium.org/blink/trunk@163249 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Inline setRecordingProfile

BUG=324769
R=alph@chromium.org

Review URL: https://codereview.chromium.org/98673006

git-svn-id: svn://svn.chromium.org/blink/trunk@163250 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Split devtools.gyp into a gyp and a gypi file.

The devtools.gyp file is referenced from outside of blink and should
therefore be moved to blink/public

BUG=none
R=yurys@chromium.org

Review URL: https://codereview.chromium.org/100503004

git-svn-id: svn://svn.chromium.org/blink/trunk@163251 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Timeline: make TimelinePresentationModel._linkifyScriptLocation() never return null

_linkifyScriptLocation() could previously return null if the details were not specified.
The result could be accidently misused, so make details mandatory and use _linkifyLocation()
when there's no default details.

R=apavlov@chromium.org

Review URL: https://codereview.chromium.org/106183003

git-svn-id: svn://svn.chromium.org/blink/trunk@163252 bbb929c8-8fbe-4397-9dbb-9b2b20218538