Allow OpenApkAsset() to open resource files as well as assets.

base/android/apk_assets.h

Index: base/android/apk_assets.h
diff --git a/base/android/apk_assets.h b/base/android/apk_assets.h
index f5df35d559dbcefe8a6ba39ab45f9e3b61e6f3ce..6eb5da37354069dbf50f982fc17c26f61c1de7ae 100644
--- a/base/android/apk_assets.h
+++ b/base/android/apk_assets.h
@@ -20,17 +20,19 @@ bool RegisterApkAssets(JNIEnv* env);
 // Can be used from renderer process.
 // Fails if the asset is not stored uncompressed within the .apk.
 // Returns: The File Descriptor of the asset, or -1 upon failure.
+// Input arguments:
+// - |file_path|: Path to file within .apk. e.g.: assets/foo.pak
 // Output arguments:
 // - |region|: size & offset (in bytes) within the .apk of the asset.
 BASE_EXPORT int OpenApkAsset(
-    const std::string& filename,
+    const std::string& file_path,
     base::MemoryMappedFile::Region* region);
 
 // Registers an uncompressed asset from within the apk with GlobalDescriptors.
 // Returns: true in case of success, false otherwise.
 BASE_EXPORT bool RegisterApkAssetWithGlobalDescriptors(
     base::GlobalDescriptors::Key key,
-    const std::string& asset_filename);
+    const std::string& file_path);
 
 }  // namespace android
 }  // namespace base