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

content/browser/renderer_host/render_view_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 481 matching lines @@
 
   // Handle autoplay gesture override experiment.
   // Note that anything but a well-formed string turns the experiment off.
   prefs.autoplay_experiment_mode = base::FieldTrialList::FindFullName(
       "MediaElementGestureOverrideExperiment");
 
   prefs.touch_enabled = ui::AreTouchEventsEnabled();
   prefs.device_supports_touch = prefs.touch_enabled &&
       ui::GetTouchScreensAvailability() ==
           ui::TouchScreensAvailability::ENABLED;
-  prefs.available_pointer_types = ui::GetAvailablePointerTypes();
-  prefs.primary_pointer_type = ui::GetPrimaryPointerType();
-  prefs.available_hover_types = ui::GetAvailableHoverTypes();
-  prefs.primary_hover_type = ui::GetPrimaryHoverType();
+  std::tie(prefs.available_pointer_types, prefs.available_hover_types) =
+      ui::GetAvailablePointerAndHoverTypes();
+  prefs.primary_pointer_type =
+      ui::GetPrimaryPointerType(prefs.available_pointer_types);
+  prefs.primary_hover_type =
+      ui::GetPrimaryHoverType(prefs.available_hover_types);
 
 #if defined(OS_ANDROID)
   prefs.device_supports_mouse = false;
 #endif
 
   prefs.pointer_events_max_touch_points = ui::MaxTouchPoints();
 
   prefs.touch_adjustment_enabled =
       !command_line.HasSwitch(switches::kDisableTouchAdjustment);
 
@@ skipping 808 matching lines @@
     // Note: We are using the origin URL provided by the sender here. It may be
     // different from the receiver's.
     file_system_file.url =
         GURL(storage::GetIsolatedFileSystemRootURIString(
                  file_system_url.origin(), filesystem_id, std::string())
                  .append(register_name));
   }
 }
 
 }  // namespace content