Undo Utils dependency on VolumeManager

I want to use Utils in another executable, so breaking this link.

Bug: 25861755
Test: compiles (and boots, though that doesn't exercise changed code)
Change-Id: I6bb447453bb370fefb7f2f3aceb459428bdee6a7
diff --git a/Utils.cpp b/Utils.cpp
index 9c19190..1f6ff21 100644
--- a/Utils.cpp
+++ b/Utils.cpp
@@ -14,10 +14,10 @@
  * limitations under the License.
  */
 
-#include "sehandle.h"
 #include "Utils.h"
+
 #include "Process.h"
-#include "VolumeManager.h"
+#include "sehandle.h"
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -55,6 +55,8 @@
 security_context_t sFsckContext = nullptr;
 security_context_t sFsckUntrustedContext = nullptr;
 
+bool sSleepOnUnmount = true;
+
 static const char* kBlkidPath = "/system/bin/blkid";
 static const char* kKeyPath = "/data/misc/vold";
 
@@ -134,22 +136,22 @@
     }
     // Apps might still be handling eject request, so wait before
     // we start sending signals
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
 
     KillProcessesWithOpenFiles(path, SIGINT);
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
 
     KillProcessesWithOpenFiles(path, SIGTERM);
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
 
     KillProcessesWithOpenFiles(path, SIGKILL);
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
@@ -161,17 +163,17 @@
     if (KillProcessesWithOpenFiles(path, SIGINT) == 0) {
         return OK;
     }
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
 
     if (KillProcessesWithOpenFiles(path, SIGTERM) == 0) {
         return OK;
     }
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
 
     if (KillProcessesWithOpenFiles(path, SIGKILL) == 0) {
         return OK;
     }
-    if (!VolumeManager::shutting_down) sleep(5);
+    if (sSleepOnUnmount) sleep(5);
 
     // Send SIGKILL a second time to determine if we've
     // actually killed everyone with open files