Eliminate need for build_config.h for OS_* defines.

chrome/chrome.xcodeproj/project.pbxproj

 // !$*UTF8*$!
 {
         archiveVersion = 1;
         classes = {
         };
         objectVersion = 45;
         objects = {
 
 /* Begin PBXAggregateTarget section */
                 4D7B014C0E9D572C009A6919 /* run_unit_tests */ = {
@@ skipping 6403 matching lines @@
                         isa = XCBuildConfiguration;
                         buildSettings = {
                                 PRODUCT_NAME = run_unit_tests;
                         };
                         name = Release;
                 };
                 4D7BF2EA0E9D46A4009A6919 /* Debug */ = {
                         isa = XCBuildConfiguration;
                         baseConfigurationReference = 4D7BF2FC0E9D46E6009A6919 /* debug.xcconfig */;
                         buildSettings = {
-                                FEATURE_DEFINES = "ENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1\nENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1";
+                                FEATURE_DEFINES = "ENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1\nENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1 OS_MACOSX=1 OS_POSIX=1";
                                 GCC_PREPROCESSOR_DEFINITIONS = (
                                         "$(GCC_PREPROCESSOR_DEFINITIONS)",
                                         "$(FEATURE_DEFINES)",
                                         BUILDING_CHROMIUM__,
                                 );
                                 HEADER_SEARCH_PATHS = (
                                         "$(HEADER_SEARCH_PATHS)",
                                         ..,
                                         ../skia/include,
                                         ../skia/include/corecg,
                                         ../third_party/icu38/public/i18n,
                                         ../third_party/icu38/public/common,
                                         ../third_party/libjpeg,
                                         ../third_party/libxml/include,
                                         ../third_party/npapi,
                                         "$(SYMROOT)/libxml.build/$(CONFIGURATION)/generated/include",
                                 );
                                 XCODEPROJ_DEPTH = ..;
                         };
                         name = Debug;
                 };
                 4D7BF2EB0E9D46A4009A6919 /* Release */ = {
                         isa = XCBuildConfiguration;
                         baseConfigurationReference = 4D7BF2FE0E9D46E6009A6919 /* release.xcconfig */;
                         buildSettings = {
-                                FEATURE_DEFINES = "ENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1\nENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1";
+                                FEATURE_DEFINES = "ENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1\nENABLE_DATABASE=1 ENABLE_DASHBOARD_SUPPORT=0 ENABLE_JAVASCRIPT_DEBUGGER=0 ENABLE_JSC_MULTIPLE_THREADS=0 ENABLE_ICONDATABASE=0 ENABLE_XSLT=1 ENABLE_XPATH=1 ENABLE_SVG=1 ENABLE_SVG_ANIMATION=1 ENABLE_SVG_AS_IMAGE=1 ENABLE_SVG_USE=1 ENABLE_SVG_FOREIGN_OBJECT=1 ENABLE_SVG_FONTS=1 ENABLE_VIDEO=0 WEBCORE_NAVIGATOR_PLATFORM_=\"FixMeAndRemoveTrailingUnderscore\" USE_GOOGLE_URL_LIBRARY USE_SYSTEM_MALLOC=1 XP_MACOSX=1 OS_MACOSX=1 OS_POSIX=1";
                                 GCC_PREPROCESSOR_DEFINITIONS = (
                                         "$(GCC_PREPROCESSOR_DEFINITIONS)",
                                         "$(FEATURE_DEFINES)",
                                         NDEBUG,
                                         BUILDING_CHROMIUM__,
                                 );
                                 HEADER_SEARCH_PATHS = (
                                         "$(HEADER_SEARCH_PATHS)",
                                         ..,
                                         ../skia/include,
@@ skipping 387 matching lines @@
                                 E4F325980EE837BF002533CE /* Debug */,
                                 E4F325990EE837BF002533CE /* Release */,
                         );
                         defaultConfigurationIsVisible = 0;
                         defaultConfigurationName = Release;
                 };
 /* End XCConfigurationList section */
         };
         rootObject = 4D7BF2E90E9D46A4009A6919 /* Project object */;
 }