Add method to get the FeaturePromoControllerViews for a View

Bug: 1133016
Change-Id: Ia40222beff775014959a6b52ce25ef36893d713d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2503816Reviewed-by: Dana Fried <dfried@chromium.org>
Commit-Queue: Collin Baker <collinbaker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821502}

chrome/browser/ui/views/in_product_help/feature_promo_controller_views.cc

@@ -21,6 +21,7 @@
 #include "chrome/browser/ui/views/in_product_help/feature_promo_registry.h"
 #include "components/feature_engagement/public/feature_constants.h"
 #include "components/feature_engagement/public/tracker.h"
+#include "ui/views/view.h"
 
 FeaturePromoControllerViews::FeaturePromoControllerViews(
     BrowserView* browser_view)
@@ -43,6 +44,21 @@ FeaturePromoControllerViews::~FeaturePromoControllerViews() {
   promo_bubble_->GetWidget()->Close();
 }
 
+// static
+FeaturePromoControllerViews* FeaturePromoControllerViews::GetForView(
+    views::View* view) {
+  views::Widget* widget = view->GetWidget();
+  if (!widget)
+    return nullptr;
+
+  BrowserView* browser_view =
+      BrowserView::GetBrowserViewForNativeWindow(widget->GetNativeWindow());
+  if (!browser_view)
+    return nullptr;
+
+  return browser_view->feature_promo_controller();
+}
+
 bool FeaturePromoControllerViews::MaybeShowPromoWithParams(
     const base::Feature& iph_feature,
     const FeaturePromoBubbleParams& params) {

chrome/browser/ui/views/in_product_help/feature_promo_controller_views.h

@@ -39,6 +39,11 @@ class FeaturePromoControllerViews : public FeaturePromoController,
   explicit FeaturePromoControllerViews(BrowserView* browser_view);
   ~FeaturePromoControllerViews() override;
 
+  // Get the appropriate instance for |view|. This finds the BrowserView
+  // that contains |view| and returns its instance. May return nullptr,
+  // but if |view| is in a BrowserView's hierarchy it shouldn't.
+  static FeaturePromoControllerViews* GetForView(views::View* view);
+
   // Repositions the bubble (if showing) relative to the anchor view.
   // This should be called whenever the anchor view is potentially
   // moved. It is safe to call this if a bubble is not showing.

chrome/browser/ui/views/in_product_help/feature_promo_controller_views_unittest.cc

@@ -99,6 +99,15 @@ class FeaturePromoControllerViewsTest : public TestWithBrowserView {
   }
 };
 
+TEST_F(FeaturePromoControllerViewsTest, GetForView) {
+  EXPECT_EQ(controller_,
+            FeaturePromoControllerViews::GetForView(GetAnchorView()));
+
+  // For a view not in the BrowserView's hierarchy, it should return null.
+  views::View orphan_view;
+  EXPECT_EQ(nullptr, FeaturePromoControllerViews::GetForView(&orphan_view));
+}
+
 TEST_F(FeaturePromoControllerViewsTest, AsksBackendToShowPromo) {
   EXPECT_CALL(*mock_tracker_, ShouldTriggerHelpUI(Ref(kTestIPHFeature)))
       .Times(1)