scons: excise more scons references from the code base

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index f07ec08a366bf1c9ca8ce6d643d80188ca553be7..8e65f2d8e143be92b1c7e91c9101f1c16122e394 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -541,9 +541,6 @@
               }],
             ],
           }],
-          # Linux gyp (into scons) doesn't like target_conditions?
-          # TODO(???): track down why 'target_conditions' doesn't work
-          # on Linux gyp into scons like it does on Mac gyp into xcodeproj.
           ['OS=="linux"', {
             'cflags': [ '-ftest-coverage',
                         '-fprofile-arcs' ],
@@ -894,73 +891,6 @@
         'ldflags': [
           '-pthread', '-Wl,-z,noexecstack',
         ],
-        'scons_variable_settings': {
-          'LIBPATH': ['$LIB_DIR'],
-          # Linking of large files uses lots of RAM, so serialize links
-          # using the handy flock command from util-linux.
-          'FLOCK_LINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$LINK'],
-          'FLOCK_SHLINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$SHLINK'],
-          'FLOCK_LDMODULE': ['flock', '$TOP_BUILDDIR/linker.lock', '$LDMODULE'],
-
-          # We have several cases where archives depend on each other in
-          # a cyclic fashion.  Since the GNU linker does only a single
-          # pass over the archives we surround the libraries with
-          # --start-group and --end-group (aka -( and -) ). That causes
-          # ld to loop over the group until no more undefined symbols
-          # are found. In an ideal world we would only make groups from
-          # those libraries which we knew to be in cycles. However,
-          # that's tough with SCons, so we bodge it by making all the
-          # archives a group by redefining the linking command here.
-          #
-          # TODO:  investigate whether we still have cycles that
-          # require --{start,end}-group.  There has been a lot of
-          # refactoring since this was first coded, which might have
-          # eliminated the circular dependencies.
-          #
-          # Note:  $_LIBDIRFLAGS comes before ${LINK,SHLINK,LDMODULE}FLAGS
-          # so that we prefer our own built libraries (e.g. -lpng) to
-          # system versions of libraries that pkg-config might turn up.
-          # TODO(sgk): investigate handling this not by re-ordering the
-          # flags this way, but by adding a hook to use the SCons
-          # ParseFlags() option on the output from pkg-config.
-          'LINKCOM': [['$FLOCK_LINK', '-o', '$TARGET',
-                       '$_LIBDIRFLAGS', '$LINKFLAGS', '$SOURCES',
-                       '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
-          'SHLINKCOM': [['$FLOCK_SHLINK', '-o', '$TARGET',
-                         '$_LIBDIRFLAGS', '$SHLINKFLAGS', '$SOURCES',
-                         '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
-          'LDMODULECOM': [['$FLOCK_LDMODULE', '-o', '$TARGET',
-                           '$_LIBDIRFLAGS', '$LDMODULEFLAGS', '$SOURCES',
-                           '-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
-          'IMPLICIT_COMMAND_DEPENDENCIES': 0,
-          # -rpath is only used when building with shared libraries.
-          'conditions': [
-            [ 'library=="shared_library"', {
-              'RPATH': '$LIB_DIR',
-            }],
-          ],
-        },
-        'scons_import_variables': [
-          'AS',
-          'CC',
-          'CXX',
-          'LINK',
-        ],
-        'scons_propagate_variables': [
-          'AS',
-          'CC',
-          'CCACHE_DIR',
-          'CXX',
-          'DISTCC_DIR',
-          'DISTCC_HOSTS',
-          'HOME',
-          'INCLUDE_SERVER_ARGS',
-          'INCLUDE_SERVER_PORT',
-          'LINK',
-          'CHROME_BUILD_TYPE',
-          'CHROMIUM_BUILD',
-          'OFFICIAL_BUILD',
-        ],
         'configurations': {
           'Debug_Base': {
             'variables': {
@@ -1500,10 +1430,6 @@
       },
     }],
   ],
-  'scons_settings': {
-    'sconsbuild_dir': '<(DEPTH)/sconsbuild',
-    'tools': ['ar', 'as', 'gcc', 'g++', 'gnulink', 'chromium_builders'],
-  },
   'xcode_settings': {
     # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!
     # This block adds *project-wide* configuration settings to each project