Temporarily restore make dependencies

Makefile

 # 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 193 matching lines @@
 # With this flag set, by default v8 will only use features implied
 # by the compiler (no probe). This is done by modifying the default
 # values of enable_armv7, enable_vfp3, enable_32dregs and enable_neon.
 # Modifying these flags when launching v8 will enable the probing for
 # the specified values.
 ifeq ($(arm_test_noprobe), on)
   GYPFLAGS += -Darm_test_noprobe=on
 endif
 
 # ----------------- available targets: --------------------
+# - "builddeps": pulls in external dependencies for building
+# - "dependencies": pulls in all external dependencies
 # - "grokdump": rebuilds heap constants lists used by grokdump
 # - any arch listed in ARCHES (see below)
 # - any mode listed in MODES
 # - every combination <arch>.<mode>, e.g. "ia32.release"
 # - "native": current host's architecture, release mode
 # - any of the above with .check appended, e.g. "ia32.release.check"
 # - "android": cross-compile for Android/ARM
 # - "nacl" : cross-compile for Native Client (ia32 and x64)
 # - default (no target specified): build all DEFAULT_ARCHES and MODES
 # - "check": build all targets and run all tests
@@ skipping 253 matching lines @@
         @find include src test -name '*.h' -o -name '*.cc' -o -name '*.c' > $@
 
 # We need to manually set the stack limit here, to work around bugs in
 # gmake-3.81 and global-5.7.1 on recent 64-bit Linux systems.
 GPATH GRTAGS GSYMS GTAGS: gtags.files $(shell cat gtags.files 2> /dev/null)
         @bash -c 'ulimit -s 10240 && GTAGSFORCECPP=yes gtags -i -q -f $<'
 
 gtags.clean:
         rm -f gtags.files GPATH GRTAGS GSYMS GTAGS
 
-dependencies builddeps:
-        $(error Use 'gclient sync' instead)
+# Dependencies. "builddeps" are dependencies required solely for building,
+# "dependencies" includes also dependencies required for development.
+# Remember to keep these in sync with the DEPS file.
+builddeps:
+        svn checkout --force https://gyp.googlecode.com/svn/trunk build/gyp \
+            --revision 1831
+        if svn info third_party/icu 2>&1 | grep -q icu46 ; then \
+          svn switch --force \
+              https://src.chromium.org/chrome/trunk/deps/third_party/icu52 \
+              third_party/icu --revision 277999 ; \
+        else \
+          svn checkout --force \
+              https://src.chromium.org/chrome/trunk/deps/third_party/icu52 \
+              third_party/icu --revision 277999 ; \
+        fi
+        svn checkout --force https://googletest.googlecode.com/svn/trunk \
+            testing/gtest --revision 692
+        svn checkout --force https://googlemock.googlecode.com/svn/trunk \
+            testing/gmock --revision 485
+
+dependencies: builddeps
+        # The spec is a copy of the hooks in v8's DEPS file.
+        gclient sync -r fb782d4369d5ae04f17a2fceef7de5a63e50f07b --spec="solutions = [{u'managed': False, u'name': u'buildtools', u'url': u'https://chromium.googlesource.com/chromium/buildtools.git', u'custom_deps': {}, u'custom_hooks': [{u'name': u'clang_format_win',u'pattern': u'.',u'action': [u'download_from_google_storage',u'--no_resume',u'--platform=win32',u'--no_auth',u'--bucket',u'chromium-clang-format',u'-s',u'buildtools/win/clang-format.exe.sha1']},{u'name': u'clang_format_mac',u'pattern': u'.',u'action': [u'download_from_google_storage',u'--no_resume',u'--platform=darwin',u'--no_auth',u'--bucket',u'chromium-clang-format',u'-s',u'buildtools/mac/clang-format.sha1']},{u'name': u'clang_format_linux',u'pattern': u'.',u'action': [u'download_from_google_storage',u'--no_resume',u'--platform=linux*',u'--no_auth',u'--bucket',u'chromium-clang-format',u'-s',u'buildtools/linux64/clang-format.sha1']}],u'deps_file': u'.DEPS.git', u'safesync_url': u''}]"