Update from https://crrev.com/333737

base/android/java/src/org/chromium/base/library_loader/Linker.java

Index: base/android/java/src/org/chromium/base/library_loader/Linker.java
diff --git a/base/android/java/src/org/chromium/base/library_loader/Linker.java b/base/android/java/src/org/chromium/base/library_loader/Linker.java
index 7e5099875a6d9be9b438c2e117e3ec7bdc2073b3..9a64a3fddbfd3b9837326daa6aaabc9edbdceb22 100644
--- a/base/android/java/src/org/chromium/base/library_loader/Linker.java
+++ b/base/android/java/src/org/chromium/base/library_loader/Linker.java
@@ -798,19 +798,6 @@ public class Linker {
     }
 
     /**
-     * Enable the fallback due to lack of support for mapping the APK file with
-     * executable permission (see crbug.com/398425).
-     */
-    public static void enableNoMapExecSupportFallback() {
-        synchronized (Linker.class) {
-            ensureInitializedLocked();
-
-            if (DEBUG) Log.i(TAG, "Enabling no map executable support fallback");
-            nativeEnableNoMapExecSupportFallback();
-        }
-    }
-
-    /**
      * Determine whether a library is the linker library. Also deal with the
      * component build that adds a .cr suffix to the name.
      */
@@ -838,26 +825,6 @@ public class Linker {
     }
 
     /**
-     * Check whether the device supports mapping the APK file with executable permission.
-     *
-     * @param apkFile Filename of the APK.
-     * @return true if supported.
-     */
-    public static boolean checkMapExecSupport(String apkFile) {
-        assert apkFile != null;
-
-        synchronized (Linker.class) {
-            ensureInitializedLocked();
-
-            if (DEBUG) Log.i(TAG, "checkMapExecSupport: " + apkFile);
-            boolean supported = nativeCheckMapExecSupport(apkFile);
-            if (DEBUG) Log.i(TAG, "Mapping the APK file with executable permission "
-                    + (supported ? "" : "NOT ") + "supported");
-            return supported;
-        }
-    }
-
-    /**
      * Check whether a library is page aligned and uncompressed in the APK file.
      *
      * @param apkFile Filename of the APK.
@@ -927,12 +894,6 @@ public class Linker {
                                                              LibInfo libInfo);
 
     /**
-     * Native method used to enable the fallback due to lack of support for
-     * mapping the APK file with executable permission.
-     */
-    private static native void nativeEnableNoMapExecSupportFallback();
-
-    /**
      * Native method used to create a shared RELRO section.
      * If the library was already loaded at the same address using
      * nativeLoadLibrary(), this creates the RELRO for it. Otherwise,
@@ -988,15 +949,6 @@ public class Linker {
     private static native String nativeGetLibraryFilePathInZipFile(String library);
 
     /**
-     * Native method which checks whether the device supports mapping the APK file
-     * with executable permission.
-     *
-     * @param apkFile Filename of the APK.
-     * @return true if supported.
-     */
-    private static native boolean nativeCheckMapExecSupport(String apkFile);
-
-    /**
      * Native method which checks whether a library is page aligned and
      * uncompressed in the APK file.
      *