Revert "[wasm] Debug in Liftoff by default"

This reverts commit 4482650907.

Reason for revert: Broke V8 Linux64 TSAN https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/30932?

Original change's description:
> [wasm] Debug in Liftoff by default
> 
> This flips the --debug-in-liftoff flag to be on by default.
> There are still some outstanding issues with that configuration, but not
> more than with the interpreter configuration. Thus flip now, such that
> we can fully focus on stabilizing that config.
> 
> R=​ecmziegler@chromium.org
> 
> Bug: v8:10351
> Change-Id: I7681f40aa2516557ef3ab4efd9a2c1f88e3b4df7
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135727
> Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67018}

TBR=clemensb@chromium.org,ecmziegler@chromium.org

Change-Id: Idd0f7f6101e55785fba9afc3d9af09c0324d7c3b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10351
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2137565
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67019}

src/flags/flag-definitions.h

@@ -718,9 +718,10 @@ DEFINE_BOOL(trace_wasm_memory, false,
 DEFINE_INT(wasm_tier_mask_for_testing, 0,
            "bitmask of functions to compile with TurboFan instead of Liftoff")
 
-DEFINE_BOOL(
-    debug_in_liftoff, true,
-    "use Liftoff instead of the C++ interpreter for debugging WebAssembly")
+DEFINE_BOOL(debug_in_liftoff, false,
+            "use Liftoff instead of the C++ interpreter for debugging "
+            "WebAssembly (experimental)")
+DEFINE_IMPLICATION(future, debug_in_liftoff)
 
 DEFINE_BOOL(validate_asm, true, "validate asm.js modules before compiling")
 DEFINE_BOOL(suppress_asm_messages, false,

test/inspector/debugger/wasm-inspect-many-registers.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --debug-in-liftoff
+
 const {session, contextGroup, Protocol} =
     InspectorTest.start('Test inspecting register values in Liftoff.');
 

test/inspector/debugger/wasm-scope-info-liftoff.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --debug-in-liftoff
+
 let {session, contextGroup, Protocol} = InspectorTest.start(
     'Test retrieving scope information from compiled Liftoff frames');
 session.setupScriptMap();

test/inspector/debugger/wasm-scope-info.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --debug-in-liftoff
+
 let {session, contextGroup, Protocol} = InspectorTest.start(
     'Test retrieving scope information when pausing in wasm functions');
 session.setupScriptMap();

test/inspector/debugger/wasm-set-breakpoint-liftoff.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --debug-in-liftoff
+
 const {session, contextGroup, Protocol} =
     InspectorTest.start('Tests stepping through wasm scripts.');
 session.setupScriptMap();

test/inspector/debugger/wasm-stepping-liftoff.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --debug-in-liftoff
+
 let {session, contextGroup, Protocol} =
     InspectorTest.start('Tests stepping through wasm scripts by byte offsets');
 session.setupScriptMap();

test/inspector/inspector.status

@@ -14,12 +14,15 @@
 
   # https://crbug.com/v8/9029
   'debugger/script-on-after-compile-snapshot': [SKIP],
+}],  # ALWAYS
 
+##############################################################################
+['variant == future', {
   # https://crbug.com/v8/10356
   # This test worked in the wasm interpreter, but fails when using Liftoff for
   # debugging.
   'debugger/wasm-anyref-global': [FAIL],
-}],  # ALWAYS
+}],
 
 ##############################################################################
 ['system == android', {