The spec specifies that a non-true return values from the trap functions
should be treated as error in the strict mode. With the new lazy feedback
effort inferring the language mode is expensive and causes regression on
these tests. Since the test doesn't actually need to test this, fixing
them to return true would help test the performance of calling the trap
without the unnecessary overhead of inferring the language mode.

Bug: chromium:925289
Change-Id: Ib650c3210ee260296257ae3b56174099a5492675
Reviewed-on: https://chromium-review.googlesource.com/c/1462959
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59505}

Bug: v8:6557
Change-Id: Ia858c87a602a37e70d9df61c7225eda10e566258
Reviewed-on: https://chromium-review.googlesource.com/663727Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Maya Lekova <mslekova@google.com>
Cr-Commit-Position: refs/heads/master@{#47990}

Add additional tests for Proxy get and has property.

Bug: v8:6560, v8:6557
Change-Id: I56360c230b03a16425f4068d8023f90b3164eebb
Reviewed-on: https://chromium-review.googlesource.com/607889
Commit-Queue: Maya Lekova <mslekova@google.com>
Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47290}

Bug: v8:6664, v8:6557
Change-Id: Ib0f9b258d49f96bee041cbcfc589f3ec91e013ed
Reviewed-on: https://chromium-review.googlesource.com/597859Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Maya Lekova <mslekova@google.com>
Cr-Commit-Position: refs/heads/master@{#47110}

Bug: v8:6559, v8:6557
Change-Id: Ide0114a5cdcce3cf948a070465460662c56bad8d
Reviewed-on: https://chromium-review.googlesource.com/577527Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Commit-Queue: Maya Lekova <mslekova@google.com>
Cr-Commit-Position: refs/heads/master@{#46757}

Bug: v8:6558, v8:6557
Change-Id: Ife58f78d00bfd53d6b904e838cbd028f039945b4
Reviewed-on: https://chromium-review.googlesource.com/567501
Commit-Queue: Maya Lekova <mslekova@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46588}

Bug: 
Change-Id: I95285260b0848c4c876498bfef0b13ffbe6855ad
Reviewed-on: https://chromium-review.googlesource.com/558297Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Maya Lekova <mslekova@google.com>
Cr-Commit-Position: refs/heads/master@{#46415}