[linux] Allow font to use below 1.0f scale

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 637e78a22e4d66efe7f6bd1f2f313d191d3fabf6..683bf133c695a3d7580f035ea331636e8a666601 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2068,6 +2068,11 @@ const FeatureEntry kFeatureEntries[] = {
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
+#if defined(OS_LINUX)
+    {"enable-xdpi-for-dsf", IDS_FLAGS_ENABLE_XDPI_FOR_DSF_NAME,
+     IDS_FLAGS_ENABLE_XDPI_FOR_DSF_DESCRIPTION, kOsLinux,
+     SINGLE_VALUE_TYPE(switches::kEnableXDpiForDsf)},
+#endif  // OS_LINUX
 };
 
 class FlagsStateSingleton {