chrome/blink: Add functionality for in-product help for media elements.

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index 05424a1ee0886db14bf52e7539ab60ca7f6bc69c..4d577440eac97f447fc725050ccafcc30979cab1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -87,6 +87,7 @@ import org.chromium.chrome.browser.tabmodel.TabModelSelector;
 import org.chromium.chrome.browser.tabmodel.TabReparentingParams;
 import org.chromium.chrome.browser.util.ColorUtils;
 import org.chromium.chrome.browser.util.FeatureUtilities;
+import org.chromium.chrome.browser.widget.textbubble.TextBubble;
 import org.chromium.chrome.browser.widget.textbubble.ViewAnchoredTextBubble;
 import org.chromium.components.dom_distiller.core.DomDistillerUrlUtils;
 import org.chromium.components.feature_engagement_tracker.EventConstants;
@@ -382,6 +383,11 @@ public class Tab
 
     private ChromeDownloadDelegate mDownloadDelegate;
 
+    /**
+     * The Text bubble used to display In Product help widget for download feature on videos.
+     */
+    private TextBubble mDownloadIPHBubble;
+
     /** Whether or not the tab closing the tab can send the user back to the app that opened it. */
     private boolean mIsAllowedToReturnToExternalApp;
 
@@ -1856,6 +1862,8 @@ public class Tab
         for (TabObserver observer : mObservers) observer.onDestroyed(this);
         mObservers.clear();
 
+        hideMediaDownloadInProductHelp();
+
         NativePage currentNativePage = mNativePage;
         mNativePage = null;
         destroyNativePageInternal(currentNativePage);
@@ -3104,6 +3112,50 @@ public class Tab
         nativeEnableEmbeddedMediaExperience(mNativeTabAndroid, enabled);
     }
 
+    @CalledByNative
+    private void showMediaDownloadInProductHelp(int x, int y, int width, int height) {
+        // If we are not currently showing the widget, ask the tracker if we can show it.
+        if (mDownloadIPHBubble == null) {
+            FeatureEngagementTracker tracker =
+                    FeatureEngagementTrackerFactory.getFeatureEngagementTrackerForProfile(
+                            getProfile());
+            tracker.notifyEvent(EventConstants.MEDIA_DOWNLOAD_BUTTON_DISPLAYED);
+            if (tracker.shouldTriggerHelpUI(FeatureConstants.MEDIA_DOWNLOAD_FEATURE)) {
+                mDownloadIPHBubble = new TextBubble(getApplicationContext(),
+                        mContentViewCore.getContainerView(), R.string.iph_media_download_text,
+                        R.string.iph_media_download_accessibility_text);
+                mDownloadIPHBubble.setDismissOnTouchInteraction(true);
+                mDownloadIPHBubble.addOnDismissListener(new OnDismissListener() {
+                    @Override
+                    public void onDismiss() {
+                        hideMediaDownloadInProductHelp();
+                    }
+                });
+            } else {
+                // Inform native that the button was dismissed to notify the renderer that the
+                // request was rejected.
+                nativeDownloadMediaInProductHelpDismissed(mNativeTabAndroid);
+                return;
+            }
+        }
+
+        Rect rect = new Rect(x, y, x + width, y + height);
+        mDownloadIPHBubble.setAnchorRect(rect);
+        mDownloadIPHBubble.show();
+    }
+
+    @CalledByNative
+    private void hideMediaDownloadInProductHelp() {
+        if (mDownloadIPHBubble == null) return;
+
+        mDownloadIPHBubble.dismiss();
+        mDownloadIPHBubble = null;
+        FeatureEngagementTracker tracker =
+                FeatureEngagementTrackerFactory.getFeatureEngagementTrackerForProfile(getProfile());
+        tracker.dismissed(FeatureConstants.MEDIA_DOWNLOAD_FEATURE);
+        nativeDownloadMediaInProductHelpDismissed(mNativeTabAndroid);
+    }
+
     private native void nativeInit();
     private native void nativeDestroy(long nativeTabAndroid);
     private native void nativeInitWebContents(long nativeTabAndroid, boolean incognito,
@@ -3136,4 +3188,5 @@ public class Tab
     private native void nativeSetWebappManifestScope(long nativeTabAndroid, String scope);
     private native void nativeEnableEmbeddedMediaExperience(long nativeTabAndroid, boolean enabled);
     private native void nativeAttachDetachedTab(long nativeTabAndroid);
+    private native void nativeDownloadMediaInProductHelpDismissed(long nativeTabAndroid);
 }