linux_aura: Fixes a couple of issues with the button border integration.

ui/views/controls/button/button.cc

Index: ui/views/controls/button/button.cc
diff --git a/ui/views/controls/button/button.cc b/ui/views/controls/button/button.cc
index 83df6e2b99cbe76ec1960263bad7d62a15e611fb..d19b0167577ddb65d135f62f5fa3781c4f76f230 100644
--- a/ui/views/controls/button/button.cc
+++ b/ui/views/controls/button/button.cc
@@ -10,6 +10,21 @@
 namespace views {
 
 ////////////////////////////////////////////////////////////////////////////////
+// Button, static public:
+
+// static
+Button::ButtonState Button::GetButtonStateFrom(ui::NativeTheme::State state) {
+  switch (state) {
+    case ui::NativeTheme::kDisabled: return Button::STATE_DISABLED;
+    case ui::NativeTheme::kHovered:  return Button::STATE_HOVERED;
+    case ui::NativeTheme::kNormal:   return Button::STATE_NORMAL;
+    case ui::NativeTheme::kPressed:  return Button::STATE_PRESSED;
+    case ui::NativeTheme::kMaxState: NOTREACHED() << "Unknown state: " << state;
+  }
+  return Button::STATE_NORMAL;
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // Button, public:
 
 Button::~Button() {