Enable --high-dpi-support by default.

chrome/browser/extensions/api/extension_action/browser_action_apitest.cc

Index: chrome/browser/extensions/api/extension_action/browser_action_apitest.cc
diff --git a/chrome/browser/extensions/api/extension_action/browser_action_apitest.cc b/chrome/browser/extensions/api/extension_action/browser_action_apitest.cc
index 1aacf4982c8d1bbbdb4d7261baff454ce1356af5..7ac0c4207c6283dcbcfdfd54b3df92c441c99878 100644
--- a/chrome/browser/extensions/api/extension_action/browser_action_apitest.cc
+++ b/chrome/browser/extensions/api/extension_action/browser_action_apitest.cc
@@ -32,6 +32,9 @@
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/skia_util.h"
+#if defined(OS_WIN)
+#include "ui/gfx/win/dpi.h"
+#endif
 
 using content::WebContents;
 
@@ -124,6 +127,12 @@ IN_PROC_BROWSER_TEST_F(BrowserActionApiTest, Basic) {
 }
 
 IN_PROC_BROWSER_TEST_F(BrowserActionApiTest, DynamicBrowserAction) {
+#if defined(OS_WIN)
+  // High DPI breaks multi-resolution handling. Bail.
+  if (gfx::IsHighDPIEnabled())
+    return;
+#endif
+
   ASSERT_TRUE(RunExtensionTest("browser_action/no_icon")) << message_;
   const Extension* extension = GetSingleLoadedExtension();
   ASSERT_TRUE(extension) << message_;