Revert 160087 "Move privateTemplateUniqueKey / sharedTemplateUni..."

> Move privateTemplateUniqueKey / sharedTemplateUniqueKey in the 
> generated bindings to .rodata section instead of .data by
> getting rid of the pointer.
> 
> This makes sure that it can be shared between different library
> instances, and should help saving RAM on mobile / Android. This
> also reduces the number of relocations in libchromeview_prebuilt.so
> by 18 according to relinfo.
> 
> BUG=249746
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/29553002

TBR=ch.dumez@samsung.com

Review URL: https://codereview.chromium.org/33913002

git-svn-id: svn://svn.chromium.org/blink/trunk@160107 bbb929c8-8fbe-4397-9dbb-9b2b20218538