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This supports the “double handler” or “double handler with low probability” models from https://crashpad.chromium.org/bug/143. For crashpad_handler to be become its own client, it needs access to its own executable path to pass to CrashpadClient::StartHandler(). This was formerly available in the test-only test::Paths::Executable(). Bring that function’s implementation to the non-test Paths::Executable() in util/misc, and rename test::Paths to test::TestPaths to avoid future confusion. test::TestPaths must still be used to access TestDataRoot(), which does not make any sense to non-test code. test::TestPaths::Executable() is retained for use by tests, which most likely prefer the fatal semantics of that function. Paths::Executable() is not fatal because for the purposes of implementing the double handler, a failure to locate the executable path (which may happen on some systems in deeply-nested directory hierarchies) shouldn’t cause the initial crashpad_handler to abort, even if it does prevent a second crashpad_handler from being started. Bug: crashpad:143 Test: crashpad_util_test Paths.*, crashpad_test_test TestPaths.* Change-Id: I9f75bf61839ce51e33c9f7c0d7031cebead6a156 Reviewed-on: https://chromium-review.googlesource.com/466346 Reviewed-by: Scott Graham <scottmg@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org>