Fix a crash when creating an incognito tab.

The KitKat's WebView doesn't support an incognito mode.
Opening an incognito tab leads to a crash.
So it would be nice to hide the menu itself in the KitKat or later.

Change-Id: I9853df92f3a4e404b528640776725b34b675fee5
Signed-off-by: Sungmann Cho <sungmann.cho@navercorp.com>
Fix a crash when creating an incognito tab in the quick controls mode.

The KitKat's WebView doesn't support an incognito mode.
Opening an incognito tab leads to a crash.
So it would be nice to hide the menu itself in the KitKat or later.

Change-Id: I788969a7a634d3e14653681a8489ff8719df6a4f
Signed-off-by: Sungmann Cho <sungmann.cho@navercorp.com>
Fix the problem that the layout of the suggestion drop down list does not fit to the screen width when an orientation changes.

Steps to reproduce:
1. Set the orientation of the Browser to landscape mode.
2. Type some keys in the url input view to show some suggestions.
3. Set the orientation to portrait mode again.

What heppended:
The width of the suggestion layout exceeds the screen width.
The arrow icon on the right side couldn't be seen.

Additional comments:
On some devices, setupDropDown() doesn't work correctly.
On the Samsung Galaxy S3, for instance, setupDropDown() produces left-hand margins.

The simplest way to fix these problems is to call setDropDownAnchor() when the url input view is created.

Change-Id: Icfe979033da235a960b8b306f291802cb7c46646
Signed-off-by: Sungmann Cho <sungmann.cho@navercorp.com>