804c0d470c
(This is a merge of http://go/wvgerrit/102104) The device file unit tests use some custom matchers that were written back when we didn't have C++11. Because gMock requires std::tuple to pass a pointer AND a length to a matcher, these matchers had to estimate the length of the file. This technically meant they were causing a benign buffer overrun sometimes. Since we have C++11 now, we can fix this by using a matcher over a std::pair of the pointer and length. I also took the opportunity to refactor the matchers a little. The old matchers had many very specific overloads and also collided with the names of some standard gMock matchers. Now there are just two more-general matchers with unique names. Test: CE CDM Unit Tests Test: Android Unit Tests Bug: 159463905 Change-Id: I758b140226bfe2bae6962ee5c64fd6af186b5819