[RemotePlayback] Use poster image as on lockscreen

chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java
index 659d14a023f88706f6ee0677b818c78027594c23..801e98f5e204e3d37e3616e04181492e48ec96e7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java
@@ -60,6 +60,8 @@ import javax.annotation.Nullable;
 public class MediaNotificationManager {
     private static final String TAG = "MediaNotification";
 
+    static final int MINIMAL_MEDIA_IMAGE_SIZE_PX = 114;
+
     @VisibleForTesting
     static final int CUSTOM_MEDIA_SESSION_ACTION_STOP = MediaSessionAction.LAST + 1;
 
@@ -540,6 +542,15 @@ public class MediaNotificationManager {
         return HIGH_IMAGE_SIZE_PX;
     }
 
+    /**
+     * @returns Whether |icon| is suitable as the media image, i.e. bigger than the minimal size.
+     * @param icon The icon to be checked.
+     */
+    public static boolean isBitmapSuitableAsMediaImage(Bitmap icon) {
+        return icon != null && icon.getWidth() >= MINIMAL_MEDIA_IMAGE_SIZE_PX
+                && icon.getHeight() >= MINIMAL_MEDIA_IMAGE_SIZE_PX;
+    }
+
     private static MediaNotificationManager getManager(int notificationId) {
         return sManagers.get(notificationId);
     }