Fix pushAllRegisters stub in the THUMB mode.

It should push high registers (r8-r11) which can be used by THUMB code as temporary storage even though most instructions operate only on low registers.

Replace the custom THUMB stub with the trampoline that correctly branches to the ARM stub. Custom THUMB stub was originally provided only to workaround interworking issues in component build.

BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/194803003

git-svn-id: svn://svn.chromium.org/blink/trunk@168922 bbb929c8-8fbe-4397-9dbb-9b2b20218538