apmanager: rename Device.InUsed to Device.InUse

This is a grammar nit, but it seems wise to deal with it before there
are too many clients depending on it.

BUG=none
TEST=FEATURES=test emerge-gizmo apmanager

Change-Id: I94ff5635c2ab878feed5ef91e418cdf1b19cc290
Reviewed-on: https://chromium-review.googlesource.com/296790
Commit-Ready: Garret Kelly <gdk@chromium.org>
Tested-by: Garret Kelly <gdk@chromium.org>
Reviewed-by: Zeping Qiu <zqiu@chromium.org>
diff --git a/device.cc b/device.cc
index 34cf4c5..29a50da 100644
--- a/device.cc
+++ b/device.cc
@@ -37,7 +37,7 @@
       manager_(manager),
       supports_ap_mode_(false) {
   SetDeviceName(device_name);
-  SetInUsed(false);
+  SetInUse(false);
 }
 
 Device::~Device() {}
@@ -152,7 +152,7 @@
 }
 
 bool Device::ClaimDevice(bool full_control) {
-  if (GetInUsed()) {
+  if (GetInUse()) {
     LOG(ERROR) << "Failed to claim device [" << GetDeviceName()
                << "]: already in used.";
     return false;
@@ -167,12 +167,12 @@
     manager_->ClaimInterface(GetPreferredApInterface());
     claimed_interfaces_.insert(GetPreferredApInterface());
   }
-  SetInUsed(true);
+  SetInUse(true);
   return true;
 }
 
 bool Device::ReleaseDevice() {
-  if (!GetInUsed()) {
+  if (!GetInUse()) {
     LOG(ERROR) << "Failed to release device [" << GetDeviceName()
                << "]: not currently in-used.";
     return false;
@@ -182,7 +182,7 @@
     manager_->ReleaseInterface(interface);
   }
   claimed_interfaces_.clear();
-  SetInUsed(false);
+  SetInUse(false);
   return true;
 }