Make XPathFunction map use non-static table of FunctionMapping

Make XPathFunction map use non-static table of FunctionMapping

The functionMap is already a global static variable. The createFunction has a check
which makes the method createFunction being called only once. Hence there is no need
of this function table to be a static table.

This reduces the bss size on linux by 656 bytes

R=haraken

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201638

[vivekg, 2015-09-02 10:10:28]

The CQ bit was checked by vivekg@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-09-02 10:10:50]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1324133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1324133002/1

[vivekg, 2015-09-02 10:11:31]

The CQ bit was unchecked by vivekg@chromium.org

[vivekg, 2015-09-02 10:11:42]

PTAL, thanks.

[vivekg, 2015-09-02 10:15:40]

https://codereview.chromium.org/1324133002/diff/1/Source/core/xml/XPathFuncti...
File Source/core/xml/XPathFunctions.cpp (right):

https://codereview.chromium.org/1324133002/diff/1/Source/core/xml/XPathFuncti...
Source/core/xml/XPathFunctions.cpp:755: if (!functionMap)
The check here makes sure the function |createFunctionMap| is being called only
once.

[vivekg, 2015-09-02 10:44:05]

Before and after:

   text	   data	    bss	    dec	    hex	filename
  38578    1976     696   41250    a122 webcore_shared.XPathFunctions.o
  38707    1976      40   40723    9f13 webcore_shared.XPathFunctions.o

[haraken, 2015-09-02 10:52:33]

LGTM

[vivekg, 2015-09-02 11:48:04]

The CQ bit was checked by vivekg@chromium.org

[commit-bot: I haz the power, 2015-09-02 11:48:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1324133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1324133002/1

[commit-bot: I haz the power, 2015-09-02 12:22:06]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201638