Support multiple flags in RuntimeEnabled

Support multiple flags in RuntimeEnabled

Some runtime features use multiple flags. This cl start to support the multiple features
in RuntimeEnabled. '&' is used for separating features.

BUG=N/A

[haraken, 2014-01-07 04:56:19]

Please add one test case to run-bindings-tests.

https://codereview.chromium.org/125533003/diff/1/Source/bindings/scripts/code...
File Source/bindings/scripts/code_generator_v8.pm (right):

https://codereview.chromium.org/125533003/diff/1/Source/bindings/scripts/code...
Source/bindings/scripts/code_generator_v8.pm:5837: # Given
[RuntimeEnabled=FeatureName,

Add ']' back.

https://codereview.chromium.org/125533003/diff/1/Source/bindings/scripts/code...
Source/bindings/scripts/code_generator_v8.pm:5848: }

A bit more readable way to do this would be:

my $operator = "";
$operator = "&" if $featureName =~ /&/;
$operator = "|" if $featureName =~ /\|/;
my @featureNames = split $operator, $featureName;
my @runtimeEnabledNames = map { "RuntimeEnabledFeatures::" . ToMethodName($_) .
"Enabled"; } @featureNames;
return join("$operator$operator", @runtimeEnabledNames);

[eseidel, 2014-01-07 05:58:35]

Most flags have instead used the depends_on= attribute in the flags themselves.
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[gyuyoung-inactive, 2014-01-07 08:33:45]

On 2014/01/07 05:58:35, eseidel wrote:
> Most flags have instead used the depends_on= attribute in the flags
themselves.
>
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

It looks this is one I want to use. If there will be any situation that we need
to use this patch, I will raise this again. Thanks, haraken and eseidel.