Fix direct load from APK on Samsung devices

This patch re-enables loading from APK on Samsung devices where the mmap
exec check is skipped (due to
https://code.google.com/p/chromium/issues/detail?id=448084).

BUG=489267

Review URL: https://codereview.chromium.org/1129223007

Cr-Commit-Position: refs/heads/master@{#330371}

diff --git a/base/android/java/src/org/chromium/base/library_loader/LibraryLoader.java b/base/android/java/src/org/chromium/base/library_loader/LibraryLoader.java
index 9dc6865..f892937 100644
--- a/base/android/java/src/org/chromium/base/library_loader/LibraryLoader.java
+++ b/base/android/java/src/org/chromium/base/library_loader/LibraryLoader.java

@@ -253,6 +253,9 @@
                         apkFilePath = context.getApplicationInfo().sourceDir;
                         if (mProbeMapApkWithExecPermission) {
                             mMapApkWithExecPermission = Linker.checkMapExecSupport(apkFilePath);
+                        } else {
+                            // Assume map executable support on Samsung devices.
+                            mMapApkWithExecPermission = true;
                         }
                         if (!mMapApkWithExecPermission && Linker.isInZipFile()) {
                             Log.w(TAG, "the no map executable support fallback will be used because"