Allow overriding library resolution in feed v2

This should fix the crash seen with isolated splits. Isolated split
class loaders are not able to load native libraries due to
b/b/171269960, so the paths must be resolved manually. This will have a
corresponding change in the internal repo.

Bug: 1143321
Change-Id: I58f4e496417248ad38b388a4e45fafb3843226bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2515439
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823666}

chrome/android/feed/core/java/src/org/chromium/chrome/browser/feed/v2/FeedStreamSurface.java

@@ -216,10 +216,16 @@ public class FeedStreamSurface implements SurfaceActionsHandler, FeedActionsHand
             implements ProcessScopeDependencyProvider {
         private Context mContext;
         private ImageFetchClient mImageFetchClient;
+        private LibraryResolver mLibraryResolver;
 
         FeedProcessScopeDependencyProvider() {
             mContext = createFeedContext(ContextUtils.getApplicationContext());
             mImageFetchClient = new FeedImageFetchClient();
+            if (BundleUtils.isIsolatedSplitInstalled(mContext, FEED_SPLIT_NAME)) {
+                mLibraryResolver = (libName) -> {
+                    return BundleUtils.getNativeLibraryPath(libName);
+                };
+            }
         }
 
         @Override
@@ -283,6 +289,11 @@ public class FeedStreamSurface implements SurfaceActionsHandler, FeedActionsHand
             }
             PostTask.postDelayedTask(traits, task, delayMs);
         }
+
+        @Override
+        public LibraryResolver getLibraryResolver() {
+            return mLibraryResolver;
+        }
     }
 
     /**

chrome/browser/xsurface/android/java/src/org/chromium/chrome/browser/xsurface/ProcessScopeDependencyProvider.java

@@ -12,6 +12,14 @@ import androidx.annotation.Nullable;
  * Provides application-level dependencies for an external surface.
  */
 public interface ProcessScopeDependencyProvider {
+    /**
+     * Resolves a library name such as "foo" to an absolute path. The library name should be in the
+     * same format given to System.loadLibrary().
+     */
+    public interface LibraryResolver {
+        String resolvePath(String libName);
+    }
+
     /** @return the context associated with the application. */
     @Nullable
     default Context getContext() {
@@ -63,4 +71,13 @@ public interface ProcessScopeDependencyProvider {
      * @param delayMs The delay before executing the task in milliseconds.
      */
     default void postTask(int taskType, Runnable task, long delayMs) {}
+
+    /**
+     * Returns a LibraryResolver to be used for resolving native library paths. If null is
+     * returned, the default library loading mechanism should be used.
+     */
+    @Nullable
+    default LibraryResolver getLibraryResolver() {
+        return null;
+    }
 }