This reverts commit e15f5544.

Reason for revert: it breaks the GC stress. 

Original change's description:
> Changing the return address on the stack.
> 
> Rather than patching code, the deoptimizer now replaces the
> return address in the frames with respective trampolines. 
> This change required to change the way we search for Safepoint 
> entries and for Exception Handlers. 
> It's working in architectures: x64, ia32, arm, arm64 and mips. 
> 
> Bug: V8:6563
> Change-Id: I3cbd4d192c3513f307b3a6a2ac99e60d03c753d3
> Reviewed-on: https://chromium-review.googlesource.com/586707
> Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46967}

TBR=jarin@chromium.org,bmeurer@chromium.org,jupvfranco@google.com

Change-Id: I430fa9123beef2e0723b38cdef9537181203f7e7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: V8:6563
Reviewed-on: https://chromium-review.googlesource.com/591371
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46969}