Add UMA for testing whether device supports memory mapping APK files with executable permissions.

third_party/android_crazy_linker/src/include/crazy_linker.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 CRAZY_LINKER_H
 #define CRAZY_LINKER_H
 
 // This is the crazy linker, a custom dynamic linker that can be used
 // by NDK applications to load shared libraries (not executables) with
 // a twist.
@@ skipping 325 matching lines @@
     crazy_library_t** library) _CRAZY_PUBLIC;
 
 // Close a library. This decrements its reference count. If it reaches
 // zero, the library be unloaded from the process.
 void crazy_library_close(crazy_library_t* library) _CRAZY_PUBLIC;
 
 // Close a library, with associated context to support delayed operations.
 void crazy_library_close_with_context(crazy_library_t* library,
                                       crazy_context_t* context) _CRAZY_PUBLIC;
 
+
+// Test whether the device supports memory mapping APK files with executable
+// permissions.
+// |apkfile_name| is the filename of the APK.
+// On succes, returns CRAZY_STATUS_SUCCESS.
+crazy_status_t crazy_linker_test_load_from_apk(const char* apkfile_name)
+    _CRAZY_PUBLIC;

[rmcilroy, 2014/10/10 10:27:05]

I don't think we want to extend the crazy linker API for this - could you just
do the test in linker_jni.cc instead?

[petrcermak, 2014/10/10 14:20:14]

Done.

+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
 
 #endif /* CRAZY_LINKER_H */