diff --git a/tools/v8_gypfiles/features.gypi b/tools/v8_gypfiles/features.gypi
index ecfef26bb3a..4069010f4df 100644
--- a/tools/v8_gypfiles/features.gypi
+++ b/tools/v8_gypfiles/features.gypi
@@ -196,6 +196,13 @@
     # Use switch-based dispatch if this is false.
     'v8_enable_regexp_interpreter_threaded_dispatch%': 1,
 
+    # Disable all snapshot compression.
+    'v8_enable_snapshot_compression%': 1,
+
+    # Enable control-flow integrity features, such as pointer authentication
+    # for ARM64.
+    'v8_control_flow_integrity%': 0,
+
     # Variables from v8.gni
 
     # Enable ECMAScript Internationalization API. Enabling this feature will
@@ -325,6 +332,12 @@
       ['v8_enable_regexp_interpreter_threaded_dispatch==1', {
         'defines': ['V8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH',],
       }],
+      ['v8_enable_snapshot_compression==1', {
+        'defines': ['V8_SNAPSHOT_COMPRESSION',],
+      }],
+      ['v8_control_flow_integrity==1', {
+        'defines': ['V8_ENABLE_CONTROL_FLOW_INTEGRITY',],
+      }],
     ],  # conditions
     'defines': [
       'V8_EMBEDDED_BUILTINS',
diff --git a/tools/v8_gypfiles/inspector.gypi b/tools/v8_gypfiles/inspector.gypi
index ceb904431e5..6f08333ea99 100644
--- a/tools/v8_gypfiles/inspector.gypi
+++ b/tools/v8_gypfiles/inspector.gypi
@@ -10,8 +10,6 @@
       '<(inspector_protocol_path)/lib/base_string_adapter_h.template',
       '<(inspector_protocol_path)/lib/DispatcherBase_cpp.template',
       '<(inspector_protocol_path)/lib/DispatcherBase_h.template',
-      '<(inspector_protocol_path)/lib/ErrorSupport_cpp.template',
-      '<(inspector_protocol_path)/lib/ErrorSupport_h.template',
       '<(inspector_protocol_path)/lib/Forward_h.template',
       '<(inspector_protocol_path)/lib/FrontendChannel_h.template',
       '<(inspector_protocol_path)/lib/Object_cpp.template',
diff --git a/tools/v8_gypfiles/toolchain.gypi b/tools/v8_gypfiles/toolchain.gypi
index 264b3e478ef..1a738ac8490 100644
--- a/tools/v8_gypfiles/toolchain.gypi
+++ b/tools/v8_gypfiles/toolchain.gypi
@@ -301,6 +301,11 @@
         'defines': [
           'V8_TARGET_ARCH_ARM64',
         ],
+        'conditions': [
+          ['v8_control_flow_integrity==1', {
+            'cflags': [ '-mbranch-protection=pac-ret' ],
+          }],
+        ],
       }],
       ['v8_target_arch=="s390x"', {
         'defines': [
diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index b5ad9b0dcb0..3180a386885 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -733,6 +733,15 @@
         ['want_separate_host_toolset', {
           'toolsets': ['host', 'target'],
         }],
+        ['v8_control_flow_integrity==1', {
+          'sources': [
+            '<(V8_ROOT)/src/execution/arm64/pointer-authentication-arm64.h',
+          ],
+        }, {
+          'sources': [
+            '<(V8_ROOT)/src/execution/pointer-authentication-dummy.h',
+          ],
+        }],
         ['v8_target_arch=="ia32"', {
           'sources': [  ### gcmole(arch:ia32) ###
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"x86.*?sources \+= ")',
@@ -1608,12 +1617,57 @@
     {
       'target_name': 'v8_zlib',
       'type': 'static_library',
+      'conditions': [
+        ['want_separate_host_toolset', {
+          'toolsets': ['host', 'target'],
+        }],
+      ],
       'direct_dependent_settings': {
-        'include_dirs': [ '<(V8_ROOT)/third_party/zlib' ],
+        'include_dirs': [
+          '<(V8_ROOT)/third_party/zlib',
+          '<(V8_ROOT)/third_party/zlib/google',
+        ],
       },
       'defines': [ 'ZLIB_IMPLEMENTATION' ],
-      'include_dirs': [ '<(V8_ROOT)/third_party/zlib' ],
-      'sources': [ '<(V8_ROOT)/third_party/zlib/adler32.c' ],
+      'include_dirs': [
+        '<(V8_ROOT)/third_party/zlib',
+        '<(V8_ROOT)/third_party/zlib/google',
+      ],
+      'sources': [
+        '<(V8_ROOT)/third_party/zlib/adler32.c',
+        '<(V8_ROOT)/third_party/zlib/chromeconf.h',
+        '<(V8_ROOT)/third_party/zlib/compress.c',
+        '<(V8_ROOT)/third_party/zlib/contrib/optimizations/insert_string.h',
+        '<(V8_ROOT)/third_party/zlib/contrib/optimizations/insert_string.h',
+        '<(V8_ROOT)/third_party/zlib/cpu_features.c',
+        '<(V8_ROOT)/third_party/zlib/cpu_features.h',
+        '<(V8_ROOT)/third_party/zlib/crc32.c',
+        '<(V8_ROOT)/third_party/zlib/crc32.h',
+        '<(V8_ROOT)/third_party/zlib/deflate.c',
+        '<(V8_ROOT)/third_party/zlib/deflate.h',
+        '<(V8_ROOT)/third_party/zlib/gzclose.c',
+        '<(V8_ROOT)/third_party/zlib/gzguts.h',
+        '<(V8_ROOT)/third_party/zlib/gzlib.c',
+        '<(V8_ROOT)/third_party/zlib/gzread.c',
+        '<(V8_ROOT)/third_party/zlib/gzwrite.c',
+        '<(V8_ROOT)/third_party/zlib/infback.c',
+        '<(V8_ROOT)/third_party/zlib/inffast.c',
+        '<(V8_ROOT)/third_party/zlib/inffast.h',
+        '<(V8_ROOT)/third_party/zlib/inffixed.h',
+        '<(V8_ROOT)/third_party/zlib/inflate.c',
+        '<(V8_ROOT)/third_party/zlib/inflate.h',
+        '<(V8_ROOT)/third_party/zlib/inftrees.c',
+        '<(V8_ROOT)/third_party/zlib/inftrees.h',
+        '<(V8_ROOT)/third_party/zlib/trees.c',
+        '<(V8_ROOT)/third_party/zlib/trees.h',
+        '<(V8_ROOT)/third_party/zlib/uncompr.c',
+        '<(V8_ROOT)/third_party/zlib/zconf.h',
+        '<(V8_ROOT)/third_party/zlib/zlib.h',
+        '<(V8_ROOT)/third_party/zlib/zutil.c',
+        '<(V8_ROOT)/third_party/zlib/zutil.h',
+        '<(V8_ROOT)/third_party/zlib/google/compression_utils_portable.cc',
+        '<(V8_ROOT)/third_party/zlib/google/compression_utils_portable.h',
+      ],
     },  # v8_zlib
   ],
 }