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

ui/base/touch/touch_device_linux.cc

Index: ui/base/touch/touch_device_linux.cc
diff --git a/ui/base/touch/touch_device_linux.cc b/ui/base/touch/touch_device_linux.cc
index 5767fb82ac5823776343abbbb62a1501d1d4b6d8..ae31ea06d7685b332bd4b5454d0e7a177242e926 100644
--- a/ui/base/touch/touch_device_linux.cc
+++ b/ui/base/touch/touch_device_linux.cc
@@ -37,6 +37,10 @@ int MaxTouchPoints() {
   return max_touch;
 }
 
+std::pair<int, int> GetAvailablePointerAndHoverTypes() {
+  return std::make_pair(GetAvailablePointerTypes(), GetAvailableHoverTypes());
+}
+
 // TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
 int GetAvailablePointerTypes() {
   // Assume a mouse is there
@@ -48,8 +52,7 @@ int GetAvailablePointerTypes() {
   return available_pointer_types;
 }
 
-PointerType GetPrimaryPointerType() {
-  int available_pointer_types = GetAvailablePointerTypes();
+PointerType GetPrimaryPointerType(int available_pointer_types) {
   if (available_pointer_types & POINTER_TYPE_FINE)
     return POINTER_TYPE_FINE;
   if (available_pointer_types & POINTER_TYPE_COARSE)
@@ -58,6 +61,10 @@ PointerType GetPrimaryPointerType() {
   return POINTER_TYPE_NONE;
 }
 
+PointerType GetPrimaryPointerType() {
+  return GetPrimaryPointerType(GetAvailablePointerTypes());
+}
+
 // TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
 int GetAvailableHoverTypes() {
   // Assume a mouse is there
@@ -69,8 +76,7 @@ int GetAvailableHoverTypes() {
   return available_hover_types;
 }
 
-HoverType GetPrimaryHoverType() {
-  int available_hover_types = GetAvailableHoverTypes();
+HoverType GetPrimaryHoverType(int available_hover_types) {
   if (available_hover_types & HOVER_TYPE_HOVER)
     return HOVER_TYPE_HOVER;
   if (available_hover_types & HOVER_TYPE_ON_DEMAND)
@@ -79,4 +85,8 @@ HoverType GetPrimaryHoverType() {
   return HOVER_TYPE_NONE;
 }
 
+HoverType GetPrimaryHoverType() {
+  return GetPrimaryHoverType(GetAvailableHoverTypes());
+}
+
 }  // namespace ui