Update browserAction.setIcon and pageAction.setIcon for hidpi

chrome/browser/ui/views/browser_action_view.h

Index: chrome/browser/ui/views/browser_action_view.h
diff --git a/chrome/browser/ui/views/browser_action_view.h b/chrome/browser/ui/views/browser_action_view.h
index ac35f3ac91e91cbaf9c18dd6352b57b3020abc05..b0d1435160e6c0da982293ee8ef8da3ab183c93f 100644
--- a/chrome/browser/ui/views/browser_action_view.h
+++ b/chrome/browser/ui/views/browser_action_view.h
@@ -23,6 +23,10 @@ namespace extensions {
 class Extension;
 }
 
+namespace gfx {
+class Image;
+}
+
 namespace views {
 class MenuItemView;
 class MenuRunner;
@@ -167,6 +171,9 @@ class BrowserActionButton : public views::MenuButton,
   // receive drag events.
   bool IsEnabled(int tab_id) const;
 
+  // Returns button icon so it can be accessed during tests.
+  gfx::ImageSkia GetIconForTest();
+
  protected:
   // Overridden from views::View:
   virtual void ViewHierarchyChanged(bool is_add,