Bug 123786 Following bug 109980, the compliance 6.0 should be added to the compiler's compliance list.
If the JRE/JDK used is a 1.6/6.0 VM, then the compliance 6.0 should be available. Compliance 1.6 implies source level 1.6 and target level 1.6.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/ComplianceConfigurationBlock.java
} else {
			if (rememberOld && complianceLevel.equals(fRememberedUserCompliance[IDX_COMPLIANCE])) {
				assertAsId= fRememberedUserCompliance[IDX_ASSERT_AS_IDENTIFIER];
				enumAsId= fRememberedUserCompliance[IDX_ENUM_AS_IDENTIFIER];
				source= fRememberedUserCompliance[IDX_SOURCE_COMPATIBILITY];
				target= fRememberedUserCompliance[IDX_CODEGEN_TARGET_PLATFORM];
			} else {
				updateInlineJSREnableState();
				updateAssertEnumAsIdentifierEnableState();
				return;
			}
		}
		setValue(PREF_PB_ASSERT_AS_IDENTIFIER, assertAsId);
		setValue(PREF_PB_ENUM_AS_IDENTIFIER, enumAsId);
		setValue(PREF_SOURCE_COMPATIBILITY, source);
		setValue(PREF_CODEGEN_TARGET_PLATFORM, target);
		updateControls();
		updateInlineJSREnableState();
		updateAssertEnumAsIdentifierEnableState();
	}
	
	/*
	 * Evaluate if the current compliance setting correspond to a default setting
	 */
	private String getCurrentCompliance() {
		Object complianceLevel= getValue(PREF_COMPLIANCE);
		if ((VERSION_1_3.equals(complianceLevel)
				&& IGNORE.equals(getValue(PREF_PB_ASSERT_AS_IDENTIFIER))
				&& IGNORE.equals(getValue(PREF_PB_ENUM_AS_IDENTIFIER))
				&& VERSION_1_3.equals(getValue(PREF_SOURCE_COMPATIBILITY))