Reland of land "Turn libbase into a component"

src/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 50 matching lines @@
             '..',
           ],
           'defines': [
             'BUILDING_V8_SHARED',
           ],
           'direct_dependent_settings': {
             'defines': [
               'USING_V8_SHARED',
             ],
           },
-          'target_conditions': [
-            ['OS=="android" and _toolset=="target"', {
-              'libraries': [
-                '-llog',
-              ],
-              'include_dirs': [
-                'src/common/android/include',
-              ],
-            }],
-          ],
           'conditions': [
             ['OS=="mac"', {
               'xcode_settings': {
                 'OTHER_LDFLAGS': ['-dynamiclib', '-all_load']
               },
             }],
             ['soname_version!=""', {
               'product_extension': 'so.<(soname_version)',
             }],
           ],
@@ skipping 1663 matching lines @@
         }],
         ['OS=="win" and v8_enable_i18n_support==1', {
           'dependencies': [
             '<(icu_gyp_path):icudata',
           ],
         }],
       ],
     },
     {
       'target_name': 'v8_libbase',
-      'type': 'static_library',
+      'type': '<(component)',
       'variables': {
         'optimize': 'max',
       },
       'include_dirs+': [
         '..',
       ],
       'sources': [
         'base/adapters.h',
         'base/atomic-utils.h',
         'base/atomicops.h',
         'base/atomicops_internals_arm64_gcc.h',
         'base/atomicops_internals_arm_gcc.h',
         'base/atomicops_internals_atomicword_compat.h',
         'base/atomicops_internals_mac.h',
         'base/atomicops_internals_mips_gcc.h',
         'base/atomicops_internals_mips64_gcc.h',
         'base/atomicops_internals_ppc_gcc.h',
         'base/atomicops_internals_s390_gcc.h',
         'base/atomicops_internals_tsan.h',
         'base/atomicops_internals_x86_gcc.cc',
         'base/atomicops_internals_x86_gcc.h',
         'base/atomicops_internals_x86_msvc.h',
+        'base/base-export.h',
         'base/bits.cc',
         'base/bits.h',
         'base/build_config.h',
         'base/compiler-specific.h',
         'base/cpu.cc',
         'base/cpu.h',
         'base/division-by-constant.cc',
         'base/division-by-constant.h',
         'base/debug/stack_trace.cc',
         'base/debug/stack_trace.h',
@@ skipping 27 matching lines @@
         'base/platform/semaphore.h',
         'base/safe_conversions.h',
         'base/safe_conversions_impl.h',
         'base/safe_math.h',
         'base/safe_math_impl.h',
         'base/sys-info.cc',
         'base/sys-info.h',
         'base/utils/random-number-generator.cc',
         'base/utils/random-number-generator.h',
       ],
+      'target_conditions': [
+        ['OS=="android" and _toolset=="target"', {
+          'libraries': [
+            '-llog',
+          ],
+          'include_dirs': [
+            'src/common/android/include',
+          ],
+        }],
+      ],
       'conditions': [
         ['want_separate_host_toolset==1 or \
           want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host', 'target'],
         }, {
           'toolsets': ['target'],
         }],
+        ['component=="shared_library"', {
+          'defines': [
+            'BUILDING_V8_BASE_SHARED',
+          ],
+          'direct_dependent_settings': {
+            'defines': [
+              'USING_V8_BASE_SHARED',
+            ],
+          },
+        }],
         ['OS=="linux"', {
             'link_settings': {
               'libraries': [
                 '-ldl',
                 '-lrt'
               ],
             },
             'sources': [
               'base/debug/stack_trace_posix.cc',
               'base/platform/platform-linux.cc',
@@ skipping 540 matching lines @@
               '../tools/gen-postmortem-metadata.py',
               '<@(_outputs)',
               '<@(heapobject_files)'
             ]
           }
         ]
     },
     {
       'target_name': 'mksnapshot',
       'type': 'executable',
-      'dependencies': ['v8_base', 'v8_nosnapshot', 'v8_libplatform'],
+      'dependencies': [
+        'v8_base',
+        'v8_libbase',
+        'v8_nosnapshot',
+        'v8_libplatform'
+      ],
       'include_dirs+': [
         '..',
         '<(DEPTH)',
       ],
       'sources': [
         'snapshot/mksnapshot.cc',
       ],
       'conditions': [
         ['v8_enable_i18n_support==1', {
           'dependencies': [
@@ skipping 27 matching lines @@
       'conditions': [
         ['want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }