Move closure_blocks_leopard_compat to base now that it's used by two modules.

content/content.gyp

Index: content/content.gyp
===================================================================
--- content/content.gyp	(revision 124212)
+++ content/content.gyp	(working copy)
@@ -190,69 +190,5 @@
      ],
     },
    ],
-   ['OS=="mac"', {
-     'targets': [
-       {
-         'target_name': 'closure_blocks_leopard_compat',
-         'defines!': ['CONTENT_IMPLEMENTATION'],
-         'sources': [
-           'browser/mac/closure_blocks_leopard_compat.h',
-         ],
-         'conditions': [
-           ['mac_sdk == "10.5"', {
-             'type': 'shared_library',
-             'product_name': 'closure_blocks_leopard_compat_stub',
-             'variables': {
-               # This target controls stripping directly. See below.
-               'mac_strip': 0,
-             },
-             'sources': [
-               'browser/mac/closure_blocks_leopard_compat.S',
-             ],
-             'xcode_settings': {
-               # These values are taken from libSystem.dylib in the 10.5
-               # SDK. Setting LD_DYLIB_INSTALL_NAME causes anything linked
-               # against this stub library to look for the symbols it
-               # provides in the real libSystem at runtime. When using ld
-               # from Xcode 4 or later (ld64-123.2 and up), giving two
-               # libraries with the same "install name" to the linker will
-               # cause it to print "ld: warning: dylibs with same install
-               # name". This is harmless, and ld will behave as intended
-               # here.
-               #
-               # The real library's compatibility version is used, and the
-               # value of the current version from the SDK is used to make
-               # it appear as though anything linked against this stub was
-               # linked against the real thing.
-               'LD_DYLIB_INSTALL_NAME': '/usr/lib/libSystem.B.dylib',
-               'DYLIB_COMPATIBILITY_VERSION': '1.0.0',
-               'DYLIB_CURRENT_VERSION': '111.1.4',
-
-               # Turn on stripping (yes, even in debug mode), and add the -c
-               # flag. This is what produces a stub library (MH_DYLIB_STUB)
-               # as opposed to a dylib (MH_DYLIB). MH_DYLIB_STUB files
-               # contain symbol tables and everything else needed for
-               # linking, but are stripped of section contents. This is the
-               # same way that the stub libraries in Mac OS X SDKs are
-               # created. dyld will refuse to load a stub library, so this
-               # provides some insurance in case anyone tries to load the
-               # stub at runtime.
-               'DEPLOYMENT_POSTPROCESSING': 'YES',
-               'STRIP_STYLE': 'non-global',
-               'STRIPFLAGS': '-c',
-             },
-           }, {  # else: mac_sdk != "10.5"
-             # When using the 10.6 SDK or newer, the necessary definitions
-             # are already present in libSystem.dylib. There is no need to
-             # build a stub dylib to provide these symbols at link time.
-             # This target is still useful to cause those symbols to be
-             # treated as weak imports in dependents, who still must
-             # #include closure_blocks_leopard_compat.h to get weak imports.
-             'type': 'none',
-           }],
-         ],
-       },
-     ],
-   }],
   ],
 }