Bug fix: Combobox: Focus on clicking mouse button

ui/views/controls/combobox/combobox.cc

Index: ui/views/controls/combobox/combobox.cc
diff --git a/ui/views/controls/combobox/combobox.cc b/ui/views/controls/combobox/combobox.cc
index 95f49087a48b422fb806ac96958d35ca6cf696e1..97662aa01f3c0cd2ad1be0350369acd054d27b34 100644
--- a/ui/views/controls/combobox/combobox.cc
+++ b/ui/views/controls/combobox/combobox.cc
@@ -91,6 +91,11 @@ class TransparentButton : public CustomButton {
   }
   virtual ~TransparentButton() {}
 
+  virtual bool OnMousePressed(const ui::MouseEvent& mouse_event) OVERRIDE {
+    parent()->RequestFocus();
+    return true;
+  }
+
   double GetAnimationValue() const {
     return hover_animation_->GetCurrentValue();
   }