Refactor .gyp files:

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/common.gypi b/build/standalone.gypi
similarity index 94%
copy from build/common.gypi
copy to build/standalone.gypi
index c41b2b2b626e95ed6a606d19b589615fae0957a0..56b487bd00289bab4cdc8b67e798a69826b342e8 100644
--- a/build/common.gypi
+++ b/build/standalone.gypi
@@ -25,6 +25,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# Definitions to be used when building stand-alone V8 binaries.
+
 {
   'variables': {
     'library%': 'static_library',
@@ -52,7 +54,6 @@
     'host_arch%': '<(host_arch)',
     'target_arch%': '<(target_arch)',
     'v8_target_arch%': '<(v8_target_arch)',
-    'v8_enable_debugger_support%': 1,
     'conditions': [
       ['(v8_target_arch=="arm" and host_arch!="arm") or \
         (v8_target_arch=="x64" and host_arch!="x64")', {
@@ -64,21 +65,9 @@
   },
   'target_defaults': {
     'default_configuration': 'Debug',
-    'conditions': [
-      ['v8_enable_debugger_support==1', {
-          'defines': ['ENABLE_DEBUGGER_SUPPORT',],
-        },
-      ],
-    ],
     'configurations': {
       'Debug': {
         'cflags': [ '-g', '-O0' ],
-        'defines': [ 'ENABLE_DISASSEMBLER', 'DEBUG', 'V8_ENABLE_CHECKS',
-                     'OBJECT_PRINT' ],
-      },
-      'Release': {
-        'cflags': [ '-O3', '-fomit-frame-pointer', '-fdata-sections',
-                    '-ffunction-sections' ],
       },
     },
   },
@@ -116,7 +105,7 @@
               '_HAS_EXCEPTIONS=0',
             ],
           }],
-        ],        
+        ],
         'msvs_cygwin_dirs': ['<(DEPTH)/third_party/cygwin'],
         'msvs_disabled_warnings': [4355, 4800],
         'msvs_settings': {