Add learn more link to Advanced Protection modal dialog

We will be adding more details to the Advanced Protection FAQ page (
https://support.google.com/accounts/?p=ap_faq) about deep scanning.
This CL adds a link with "Learn more" on the modal dialog, which links
to this FAQ page.

Screenshot: https://screenshot.googleplex.com/i5JHn4QZ42z.png
Bug: 1020418
Change-Id: I5bccd307f82ea17dc0b77e0c0b9e52fe0d5ea6f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026590
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Xinghui Lu <xinghuilu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736511}

chrome/browser/ui/views/safe_browsing/prompt_for_scanning_modal_dialog.cc

@@ -6,12 +6,20 @@
 
 #include <memory>
 
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/views/chrome_layout_provider.h"
+#include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/constrained_window/constrained_window_views.h"
+#include "components/strings/grit/components_strings.h"
+#include "content/public/browser/web_contents.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/base/page_transition_types.h"
 #include "ui/base/ui_base_types.h"
+#include "ui/base/window_open_disposition.h"
 #include "ui/views/controls/button/md_text_button.h"
+#include "ui/views/controls/styled_label.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/window/dialog_delegate.h"
 
@@ -23,15 +31,17 @@ void PromptForScanningModalDialog::ShowForWebContents(
     base::OnceClosure accept_callback,
     base::OnceClosure open_now_callback) {
   constrained_window::ShowWebModalDialogViews(
-      new PromptForScanningModalDialog(std::move(accept_callback),
+      new PromptForScanningModalDialog(web_contents, std::move(accept_callback),
                                        std::move(open_now_callback)),
       web_contents);
 }
 
 PromptForScanningModalDialog::PromptForScanningModalDialog(
+    content::WebContents* web_contents,
     base::OnceClosure accept_callback,
     base::OnceClosure open_now_callback)
-    : accept_callback_(std::move(accept_callback)),
+    : web_contents_(web_contents),
+      accept_callback_(std::move(accept_callback)),
       open_now_callback_(std::move(open_now_callback)) {
   DialogDelegate::set_button_label(
       ui::DIALOG_BUTTON_OK,
@@ -56,13 +66,23 @@ PromptForScanningModalDialog::PromptForScanningModalDialog(
                 views::GridLayout::kFixedSize, views::GridLayout::FIXED,
                 kMaxMessageWidth, false);
 
+  // Create the message label text.
+  std::vector<size_t> offsets;
+  base::string16 message_text = base::ReplaceStringPlaceholders(
+      base::ASCIIToUTF16("$1 $2"),
+      {l10n_util::GetStringUTF16(IDS_DEEP_SCANNING_INFO_DIALOG_MESSAGE),
+       l10n_util::GetStringUTF16(IDS_LEARN_MORE)},
+      &offsets);
+
   // Add the message label.
-  auto label = std::make_unique<views::Label>(
-      l10n_util::GetStringUTF16(IDS_DEEP_SCANNING_INFO_DIALOG_MESSAGE),
-      views::style::CONTEXT_MESSAGE_BOX_BODY_TEXT,
-      views::style::STYLE_SECONDARY);
+  auto label = std::make_unique<views::StyledLabel>(message_text, this);
+
+  gfx::Range learn_more_range(offsets[1], message_text.length());
+  views::StyledLabel::RangeStyleInfo link_style =
+      views::StyledLabel::RangeStyleInfo::CreateForLink();
+  label->AddStyleRange(learn_more_range, link_style);
+
   label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
-  label->SetMultiLine(true);
   label->SizeToFit(kMaxMessageWidth);
   layout->StartRow(views::GridLayout::kFixedSize, 0);
   layout->AddView(std::move(label));
@@ -104,4 +124,14 @@ void PromptForScanningModalDialog::ButtonPressed(views::Button* sender,
   }
 }
 
+void PromptForScanningModalDialog::StyledLabelLinkClicked(
+    views::StyledLabel* label,
+    const gfx::Range& range,
+    int event_flags) {
+  web_contents_->OpenURL(content::OpenURLParams(
+      GURL(chrome::kAdvancedProtectionDownloadLearnMoreURL),
+      content::Referrer(), WindowOpenDisposition::NEW_FOREGROUND_TAB,
+      ui::PAGE_TRANSITION_LINK, /*is_renderer_initiated=*/false));
+}
+
 }  // namespace safe_browsing

chrome/browser/ui/views/safe_browsing/prompt_for_scanning_modal_dialog.h

@@ -10,6 +10,8 @@
 #include "base/timer/timer.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/views/controls/button/button.h"
+#include "ui/views/controls/styled_label.h"
+#include "ui/views/controls/styled_label_listener.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace content {
@@ -21,7 +23,8 @@ namespace safe_browsing {
 // A tab modal dialog that provides more information to the user about the
 // prompt for deep scanning.
 class PromptForScanningModalDialog : public views::DialogDelegateView,
-                                     public views::ButtonListener {
+                                     public views::ButtonListener,
+                                     public views::StyledLabelListener {
  public:
   // Show this dialog for the given |web_contents|.
   static void ShowForWebContents(content::WebContents* web_contents,
@@ -30,7 +33,8 @@ class PromptForScanningModalDialog : public views::DialogDelegateView,
 
   // Create a PromptForScanningModalDialog attached to |web_contents|. The
   // dialog will call |accept_callback| if the user accepts the prompt.
-  PromptForScanningModalDialog(base::OnceClosure accept_callback,
+  PromptForScanningModalDialog(content::WebContents* web_contents,
+                               base::OnceClosure accept_callback,
                                base::OnceClosure open_now_callback);
   PromptForScanningModalDialog(const PromptForScanningModalDialog&) = delete;
   PromptForScanningModalDialog& operator=(const PromptForScanningModalDialog&) =
@@ -50,7 +54,15 @@ class PromptForScanningModalDialog : public views::DialogDelegateView,
   // views::ButtonListener implementation:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
+  // views::StyledLabelListener implementation:
+  void StyledLabelLinkClicked(views::StyledLabel* label,
+                              const gfx::Range& range,
+                              int event_flags) override;
+
  private:
+  // The WebContents this dialog is attached to. This is unowned.
+  content::WebContents* web_contents_;
+
   // The open now button for this dialog. The pointer is unowned, but this is a
   // child View of this dialog's View, so it has the same lifetime.
   views::Button* open_now_button_;