Add mojom module suffix in .mojom files in content.

content/browser/wake_lock/wake_lock_browsertest.cc

Index: content/browser/wake_lock/wake_lock_browsertest.cc
diff --git a/content/browser/wake_lock/wake_lock_browsertest.cc b/content/browser/wake_lock/wake_lock_browsertest.cc
index 3ac458973ceccc5f3f850e5570ec88494bf13e11..59e3ab71e1c0e168d3a7543725beafdf5517eee5 100644
--- a/content/browser/wake_lock/wake_lock_browsertest.cc
+++ b/content/browser/wake_lock/wake_lock_browsertest.cc
@@ -73,10 +73,10 @@ class WakeLockTest : public ContentBrowserTest {
   void WaitForPossibleUpdate() {
     // As Mojo channels have no common FIFO order in respect to each other and
     // to the Chromium IPC, we cannot assume that when screen.keepAwake state
-    // is changed from within a script, WakeLockService will receive an update
-    // request before ExecuteScript() returns. Therefore, some time slack is
-    // needed to make sure that WakeLockService has received any possible update
-    // requests before checking the resulting wake lock state.
+    // is changed from within a script, mojom::WakeLockService will receive an
+    // update request before ExecuteScript() returns. Therefore, some time slack
+    // is needed to make sure that mojom::WakeLockService has received any
+    // possible update requests before checking the resulting wake lock state.
     base::PlatformThread::Sleep(TestTimeouts::tiny_timeout());
     RunAllPendingInMessageLoop();
   }