Matching v8 build settings more closely to try to fix regression in performan...

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 13611)
+++ build/common.gypi	(working copy)
@@ -39,6 +39,12 @@
     # {'variables': {'library': 'shared_library'}}
     # to compile as shared by default
     'library%': 'static_library',
+
+    # TODO(bradnelson): eliminate this when possible.
+    # To allow local gyp files to prevent release.vsprops from being included.
+    # Yes(1) means include release.vsprops.
+    # Once all vsprops settings are migrated into gyp, this can go away.
+    'msvs_use_common_release%': 1,
   },
   'target_defaults': {
     'conditions': [
@@ -56,15 +62,15 @@
             'xcode_settings': {
               'GCC_INSTRUMENT_PROGRAM_FLOW_ARCS': 'YES',
               'GCC_GENERATE_TEST_COVERAGE_FILES': 'YES',
-	    },
+            },
             # Add -lgcov for executables, not for static_libraries.
             # This is a delayed conditional.
             'target_conditions': [
               ['_type=="executable"', {
                 'xcode_settings': { 'OTHER_LDFLAGS': [ '-lgcov' ] },
-	      }],
-	    ],
-	  }],
+              }],
+            ],
+          }],
           # TODO(jrg): complete this work once Linux transitions to gyp.
           # This is untested (--> likely doesn't work).
           ['OS=="linux"', {
@@ -73,8 +79,8 @@
             'target_conditions': [
               ['_type=="executable"', {
                 'link_settings': { 'libraries': [ '-lgcov' ] },
-	      }],
-	    ],
+              }],
+            ],
           }],
         ]},
       # TODO(jrg): options for code coverage on Windows
@@ -124,7 +130,7 @@
               'DEAD_CODE_STRIPPING': 'YES',
             }
           }],
-          [ 'OS=="win"', {
+          [ 'OS=="win" and msvs_use_common_release', {
             'configuration_platform': 'Win32',
             'msvs_props': ['release.vsprops'],
           }],