Load non-locale .pak files directly from the .apk on Android (rather than extracting on start-up).

ui/base/resource/resource_bundle_android.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_BUNDLE_ANDROID_H_
 #define UI_BASE_RESOURCE_RESOURCE_BUNDLE_ANDROID_H_
 
+#include <jni.h>
+#include <string>
+
 #include "base/basictypes.h"
+#include "base/files/memory_mapped_file.h"
+#include "ui/base/ui_base_export.h"
 
 namespace ui {
 
+// Loads "resources.apk" from the .apk.
+UI_BASE_EXPORT void LoadMainAndroidPackFile();

[gunsch, 2015/06/16 20:27:31]

This method doesn't appear to have a caller?

[agrieve, 2015/06/17 01:48:02]

Yikes! Nice catch! Seems I had my branches crossed. It's properly used now in
chrome_browser_main.cc

+
+// Returns the file descriptor and region for resources.pak.
+UI_BASE_EXPORT int GetMainAndroidPackFd(
+    base::MemoryMappedFile::Region* out_region);
+
+// Returns the file descriptor and region for chrome_100_percent.pak
+UI_BASE_EXPORT int GetCommonResourcesPackFd(
+    base::MemoryMappedFile::Region* out_region);
+
 // Checks whether the locale data pak is contained within the .apk.
 bool AssetContainedInApk(const std::string& filename);
 
 bool RegisterResourceBundleAndroid(JNIEnv* env);
 
 }  // namespace ui
 
 #endif  // UI_BASE_RESOURCE_RESOURCE_BUNDLE_ANDROID_H_
-