Put the 10.5 sdks into the configs to make sure we're building against what we

expect.
Review URL: http://codereview.chromium.org/18047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8005 0039d316-1c4b-4281-b951-d872f2087c98

build/common.xcconfig

@@ -16,6 +16,10 @@ GCC_WARN_ABOUT_MISSING_NEWLINE = YES
 OTHER_LDFLAGS = $(OTHER_LDFLAGS) $(CODECOVERAGE_OTHER_LDFLAGS)
 PREBINDING = NO
 
+// We're only supporting 10.5 and later
+SDKROOT = $(DEVELOPER_SDK_DIR)/MacOSX10.5.sdk
+MACOSX_DEPLOYMENT_TARGET = 10.5
+
 // Each project file must set XCODEPROJ_DEPTH as a project-wide setting.  It
 // should contain a relative path to reach the src directory from the
 // directory containing the project.  For example, src/base/base.xcodeproj