Port fd8fd05c

Original commit message:
    This functionality is useful for stubs that need to walk the stack. The new
    machine operator, LoadParentFramePointer dosn't force the currently compiling
    method to have a frame in contrast to LoadFramePointer. Instead, it adapts
    accordingly when frame elision is possible, making efficient stack walks
    possible without incurring a performance penalty for small stubs that can
    benefit from frame elision.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1700323002

Cr-Commit-Position: refs/heads/master@{#34049}