Enable --high-dpi-support by default.

ui/base/test/run_all_unittests.cc

Index: ui/base/test/run_all_unittests.cc
diff --git a/ui/base/test/run_all_unittests.cc b/ui/base/test/run_all_unittests.cc
index 8573da08506945d9afd770f696e9a9559dbc56fa..bfc5f2603b9310c0fa535df0941093a98eeab092 100644
--- a/ui/base/test/run_all_unittests.cc
+++ b/ui/base/test/run_all_unittests.cc
@@ -22,6 +22,10 @@
 #include "base/mac/bundle_locations.h"
 #endif
 
+#if defined(OS_WIN)
+#include "ui/gfx/win/dpi.h"
+#endif
+
 namespace {
 
 class UIBaseTestSuite : public base::TestSuite {
@@ -43,6 +47,10 @@ UIBaseTestSuite::UIBaseTestSuite(int argc, char** argv)
 void UIBaseTestSuite::Initialize() {
   base::TestSuite::Initialize();
 
+#if defined(OS_WIN)
+  gfx::ForceHighDPISupportForTesting(1.0);
+#endif
+
 #if defined(OS_ANDROID)
   // Register JNI bindings for android.
   gfx::android::RegisterJni(base::android::AttachCurrentThread());