Splited p3a from crash report option from first run dialog

app/brave_generated_resources.grd

@@ -1093,16 +1093,15 @@ up to 6x faster on major news sites.
         Reset Brave Rewards data...
       </message>
       <!--First-run dialog messages -->
-      <message name="IDS_FR_ENABLE_LOGGING_BRAVE" desc="Label for checkbox to ask whether to send usage stats to brave">
-          Help improve Brave by sending crash reports and
-completely anonymised, private product analytics.
+      <message name="IDS_FR_ENABLE_LOGGING_BRAVE" desc="Label for checkbox to ask whether to send crash reports to brave">
+          Help improve Brave by automatically sending crash reports
       </message>
       <message name="IDS_FR_CUSTOMIZE_DEFAULT_BROWSER_BRAVE" desc="Default browser checkbox label">
         Set Brave as your default browser
       </message>
       <if expr="is_macosx">
-        <message name="IDS_FIRSTRUN_DLG_MAC_OPTIONS_SEND_USAGE_STATS_LABEL_BRAVE" desc="Label for checkbox to ask whether to send usage stats to Google">
-          Help improve <ph name="PRODUCT_NAME">$1<ex>Brave</ex></ph> by sending crash reports and completely anonymised, private product analytics.
+        <message name="IDS_FIRSTRUN_DLG_MAC_OPTIONS_SEND_USAGE_STATS_LABEL_BRAVE" desc="Label for checkbox to ask whether to send crash reports to brave">
+          Help improve <ph name="PRODUCT_NAME">$1<ex>Brave</ex></ph> by automatically sending crash reports
         </message>
       </if>
     </messages>

browser/first_run/BUILD.gn

@@ -0,0 +1,16 @@
+# Copyright (c) 2021 The Brave Authors. All rights reserved.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+source_set("unit_tests") {
+  testonly = true
+  if (!is_android) {
+    sources = [ "first_run_unittest.cc" ]
+
+    deps = [
+      "//chrome/browser",
+      "//testing/gtest",
+    ]
+  }
+}

browser/first_run/first_run_unittest.cc

@@ -0,0 +1,11 @@
+/* Copyright (c) 2021 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "chrome/browser/first_run/first_run.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(FirstRunTest, BasicTest) {
+  EXPECT_TRUE(first_run::IsMetricsReportingOptIn());
+}

chromium_src/chrome/browser/first_run/first_run.cc

@@ -0,0 +1,19 @@
+/* Copyright (c) 2021 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#define IsMetricsReportingOptIn IsMetricsReportingOptIn_UnUsed
+#include "../../../../../chrome/browser/first_run/first_run.cc"
+#undef IsMetricsReportingOptIn
+
+namespace first_run {
+
+// This is only used for determine whether crash report checkbox in the first
+// run dialog is checked or not by default. See the comments of this upstream
+// function. Returning true means crash report is unchecked by default.
+bool IsMetricsReportingOptIn() {
+  return true;
+}
+
+}  // namespace first_run

chromium_src/chrome/browser/ui/views/first_run_dialog.cc

@@ -6,33 +6,15 @@
 #include "brave/grit/brave_generated_resources.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
-#include "ui/views/controls/button/checkbox.h"
-
-namespace views {
-// Override to call SetMultiLine().
-// The label of crash report checkbox should be formatted to 2 lines.
-// Otherwise, dialog width is too long.
-class MultiLineCheckBox : public views::Checkbox {
- public:
-  explicit MultiLineCheckBox(const base::string16& label) : Checkbox(label) {
-    SetMultiLine(true);
-  }
-  ~MultiLineCheckBox() override = default;
-  MultiLineCheckBox(const MultiLineCheckBox&) = delete;
-  MultiLineCheckBox& operator=(const MultiLineCheckBox&) = delete;
-};
-}  // namespace views
 
 // Replaced string here instead of by running 'npm run chromium_rebase_l10n'
 // because same string is used from other IDS_XXX..
 #undef IDS_FR_ENABLE_LOGGING
 #undef IDS_FR_CUSTOMIZE_DEFAULT_BROWSER
 #define IDS_FR_ENABLE_LOGGING IDS_FR_ENABLE_LOGGING_BRAVE
 #define IDS_FR_CUSTOMIZE_DEFAULT_BROWSER IDS_FR_CUSTOMIZE_DEFAULT_BROWSER_BRAVE
-#define Checkbox MultiLineCheckBox
 
 #include "../../../../../../chrome/browser/ui/views/first_run_dialog.cc"
 
 #undef IDS_FR_ENABLE_LOGGING
 #undef IDS_FR_CUSTOMIZE_DEFAULT_BROWSER
-#undef Checkbox

test/BUILD.gn

@@ -127,6 +127,7 @@ test("brave_unit_tests") {
     "//brave/browser/browsing_data",
     "//brave/browser/content_settings:unit_tests",
     "//brave/browser/download",
+    "//brave/browser/first_run:unit_tests",
     "//brave/browser/metrics/test:brave_metrics_unit_tests",
     "//brave/browser/net",
     "//brave/browser/new_tab:unittest",