Optimization: avoid making 4 JNI calls to get touch device attributes.

ui/base/touch/touch_device.h

Index: ui/base/touch/touch_device.h
diff --git a/ui/base/touch/touch_device.h b/ui/base/touch/touch_device.h
index e6c715616d3ffde5bc258eb1bd70e7dad8be15c9..0473b300e64a3bb44c1861302f062615bb697b2d 100644
--- a/ui/base/touch/touch_device.h
+++ b/ui/base/touch/touch_device.h
@@ -5,6 +5,8 @@
 #ifndef UI_BASE_TOUCH_TOUCH_DEVICE_H_
 #define UI_BASE_TOUCH_TOUCH_DEVICE_H_
 
+#include <tuple>
+
 #include "build/build_config.h"
 #include "ui/base/ui_base_export.h"
 
@@ -60,9 +62,12 @@ enum HoverType {
   HOVER_TYPE_LAST = HOVER_TYPE_HOVER
 };
 
+UI_BASE_EXPORT std::pair<int, int> GetAvailablePointerAndHoverTypes();
 UI_BASE_EXPORT int GetAvailablePointerTypes();
+UI_BASE_EXPORT PointerType GetPrimaryPointerType(int available_pointer_types);
 UI_BASE_EXPORT PointerType GetPrimaryPointerType();
 UI_BASE_EXPORT int GetAvailableHoverTypes();
+UI_BASE_EXPORT HoverType GetPrimaryHoverType(int avaliable_hover_types);
 UI_BASE_EXPORT HoverType GetPrimaryHoverType();

[sadrul, 2016/09/01 23:22:35]

Can you remove these old versions of the API?

[Tobias Sargeant, 2016/09/02 12:18:08]

Done.

 
 }  // namespace ui