Version: Any (e.g. tip of master)
OS: Android (any version)

What steps will reproduce the problem?
Run URLRequestTest.FileTest on any Android device on a user build, using the release net_unittests_apk

What is the expected result?
C   41.758s Main  ********************************************************************************
C   41.758s Main  [==========] 1 test ran.
C   41.758s Main  [  PASSED  ] 1 test.
C   41.758s Main  ********************************************************************************

What happens instead?
C   41.772s Main  Detailed Logs
C   41.772s Main  ********************************************************************************
C   41.772s Main  [FAIL] URLRequestTest.FileTest:
C   41.772s Main  [ RUN      ] URLRequestTest.FileTest
C   41.772s Main  ../../net/url_request/url_request_unittest.cc:848: Failure
C   41.772s Main  Value of: base::GetFileSize(app_path, &file_size)
C   41.773s Main    Actual: false
C   41.773s Main  Expected: true
C   41.773s Main  ../../net/url_request/url_request_unittest.cc:853: Failure
C   41.773s Main  Value of: static_cast<int>(file_size)
C   41.773s Main    Actual: -1
C   41.773s Main  Expected: d.bytes_received()
C   41.773s Main  Which is: 3200
C   41.773s Main  [  FAILED  ] URLRequestTest.FileTest (331 ms)
C   41.773s Main  ********************************************************************************
C   41.773s Main  Summary
C   41.773s Main  ********************************************************************************
C   41.774s Main  [==========] 1 test ran.
C   41.774s Main  [  PASSED  ] 0 tests.
C   41.774s Main  [  FAILED  ] 1 test, listed below:
C   41.774s Main  [  FAILED  ] URLRequestTest.FileTest
C   41.774s Main
C   41.774s Main  1 FAILED TEST
C   41.774s Main  ********************************************************************************

Please provide any additional information below. Attach a screenshot if
possible.
Tested on Nexus 5X, Nexus 7 (original version on KitKat, and new model on Lollipop), Nexus 9, and Nexus 10