Revert of Move content/browser/power_save_blocker to //device/power_save_blocker

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 540a3b552e6c94fa4dbcc0fcbdc2b82755205611..64ccb858bafcbfe2df58ebbfe928931d0ce83768 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -57,7 +57,6 @@
     "//crypto",
     "//device/battery",
     "//device/bluetooth",
-    "//device/power_save_blocker",
     "//device/vibration",
     "//gin",
     "//google_apis",
@@ -292,7 +291,20 @@
 
   if (use_x11) {
     configs += [ "//build/config/linux:x11" ]
+    if (!is_chromeos) {
+      configs += [ "//build/config/linux:xscrnsaver" ]
+    }
     deps += [ "//ui/gfx/x" ]
+  }
+
+  # Dealing with power_save_blocker_{x11,ozone}.cc is a little complicated
+  # given the interaction between os_chromeos and the feature flags for X11 and
+  # ozone, so do it all in one spot.
+  if (is_chromeos || !use_ozone) {
+    sources -= [ "power_save_blocker_ozone.cc" ]
+  }
+  if (is_chromeos || !use_x11) {
+    sources -= [ "power_save_blocker_x11.cc" ]
   }
 
   # Dealing with *wifi_data_provider_*.cc is also a bit complicated given