[Suggestions UI] Drop Bitmap references from articles under memory pressure.

chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java
index b0579b6e353ebe48a67c3b7b0ca445db25b36fb8..148da4c8056d2b8847c6c851a3268f1b9eb5c0af 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsUiDelegate.java
@@ -4,6 +4,7 @@
 
 package org.chromium.chrome.browser.suggestions;
 
+import org.chromium.base.ReferencePool;
 import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
 import org.chromium.chrome.browser.favicon.FaviconHelper.IconAvailabilityCallback;
 import org.chromium.chrome.browser.favicon.LargeIconBridge.LargeIconCallback;
@@ -29,6 +30,12 @@ public interface SuggestionsUiDelegate {
     /** Convenience method to access the {@link SuggestionsNavigationDelegate}. */
     SuggestionsNavigationDelegate getNavigationDelegate();
 
+    /**
+     * @return the reference pool to use for large objects that should be dropped under

[dgn, 2017/05/08 17:01:51]

nit: we usually captitalise the first word of the comment.

`@return` it is rendered as:

    Returns:
      the reference pool to ....

[Bernhard Bauer, 2017/05/09 08:51:10]

Done.

+     * memory pressure.
+     */
+    ReferencePool getReferencePool();
+
     // Favicons
 
     /**