android: Fix native library residency visualization.

Change-Id: Iaf6cd9ecaaf601192847a84007d5596cbb10a367
Reviewed-on: https://chromium-review.googlesource.com/919086Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: Egor Pasko <pasko@chromium.org>
Commit-Queue: Benoit L <lizeb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536733}

base/android/library_loader/library_loader_hooks.cc

@@ -216,7 +216,7 @@ static void JNI_LibraryLoader_PeriodicallyCollectResidency(
     JNIEnv* env,
     const JavaParamRef<jclass>& clazz) {
 #if BUILDFLAG(SUPPORTS_CODE_ORDERING)
-  NativeLibraryPrefetcher::PercentageOfResidentNativeLibraryCode();
+  NativeLibraryPrefetcher::PeriodicallyCollectResidency();
 #else
   LOG(WARNING) << "Collecting residency is not supported.";
 #endif

tools/android/native_lib_memory/visualize.js

@@ -57,7 +57,10 @@ function pageFillColor(page) {
   const sizeAndFilename = page.size_and_filenames[0];
   if (!sizeAndFilename) return "lightgrey";
 
-  const dominantFilename = sizeAndFilename[1];
+  let dominantFilename = sizeAndFilename[1];
+  if (dominantFilename.startsWith("obj/")) {
+    dominantFilename = dominantFilename.substring(4);
+  }
   for (let i = 0; i < COLOR_MAPPING.length; i++) {
     const prefixes = COLOR_MAPPING[i][0];
     const color = COLOR_MAPPING[i][1];