Add a missing dependency from gcm_driver.

BUG=None
TBR=dimich@chromium.org
TEST=manually

Review URL: https://codereview.chromium.org/683753002

Cr-Commit-Position: refs/heads/master@{#301569}

components/gcm_driver/BUILD.gn

@@ -46,6 +46,7 @@ static_library("gcm_driver") {
   deps = [
     "//base",
     "//components/os_crypt",
+    "//components/timers",
     "//google_apis/gcm",
     "//net",
     "//sync/protocol",
@@ -71,6 +72,7 @@ static_library("gcm_driver") {
       "gcm_stats_recorder_impl.h",
     ]
     deps -= [
+      "//components/timers",
       "//google_apis/gcm",
     ]
     deps += [ "android:jni_headers" ]