Convert PowerSaveBlockResourceThrottle to be client of WakeLock mojo service.

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 71d65fb821ab9f92b35d6d3239681e76db2cc41f..0b82a0641b3f94fad66dcc8e2dc5edb47d3f5e1d 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -891,8 +891,6 @@ source_set("browser") {
     "loader/netlog_observer.h",
     "loader/null_resource_controller.cc",
     "loader/null_resource_controller.h",
-    "loader/power_save_block_resource_throttle.cc",
-    "loader/power_save_block_resource_throttle.h",
     "loader/redirect_to_file_resource_handler.cc",
     "loader/redirect_to_file_resource_handler.h",
     "loader/resource_buffer.cc",
@@ -934,6 +932,8 @@ source_set("browser") {
     "loader/upload_progress_tracker.h",
     "loader/url_loader_factory_impl.cc",
     "loader/url_loader_factory_impl.h",
+    "loader/wake_lock_resource_throttle.cc",
+    "loader/wake_lock_resource_throttle.h",
     "loader_delegate_impl.cc",
     "loader_delegate_impl.h",
     "mach_broker_mac.h",