Enable depend on stamp by default for all GN based grit targets.

build/secondary/tools/grit/grit_rule.gni

Index: build/secondary/tools/grit/grit_rule.gni
diff --git a/build/secondary/tools/grit/grit_rule.gni b/build/secondary/tools/grit/grit_rule.gni
index 5d3b1e44357ed5a2f6b4fa91e48587c804b10439..8742b21034a41ba7c767e11c2bfcc11a93c8ee3f 100644
--- a/build/secondary/tools/grit/grit_rule.gni
+++ b/build/secondary/tools/grit/grit_rule.gni
@@ -371,20 +371,8 @@ template("grit") {
     script = "//tools/grit/grit.py"
     inputs = grit_inputs
 
-    # TODO(knn): Remove this once grit has rolled to recognize the flag.
-    depend_on_stamp =
-        defined(invoker.depend_on_stamp) && invoker.depend_on_stamp
-    if (depend_on_stamp) {
-      # Need this for migrating existing targets without clobbering.
-      depfile = "$output_dir/${grit_output_name}_stamp.d"
-      outputs = [
-        "${depfile}.stamp",
-      ]
-    } else {
-      depfile = "$output_dir/${grit_output_name}.d"
-      outputs = []
-    }
-    outputs += grit_outputs
+    depfile = "$output_dir/${grit_output_name}_stamp.d"
+    outputs = [ "${depfile}.stamp" ] + grit_outputs
 
     args = [
       "-i",
@@ -398,18 +386,15 @@ template("grit") {
       ]
     }
     args += [
-      "-o",
-      rebased_output_dir,
-      "--depdir",
-      ".",
-      "--depfile",
-      rebase_path(depfile, root_build_dir),
-      "--write-only-new=1",
-    ]
-    if (depend_on_stamp) {
-      args += [ "--depend-on-stamp" ]
-    }
-    args += grit_defines
+              "-o",
+              rebased_output_dir,
+              "--depdir",
+              ".",
+              "--depfile",
+              rebase_path(depfile, root_build_dir),
+              "--write-only-new=1",
+              "--depend-on-stamp",
+            ] + grit_defines
 
     # Add extra defines with -D flags.
     if (defined(invoker.defines)) {