Bump up allowed maxAllowedError in webaudio tests.

This allows the test to pass on linux32 after the clang switch.
The test passed on 32bit mac already with the same compiler – this turned
out to be because clang is allowed to treat sqrtf() as a builtin on mac, but not
on linux (due to glibc's math routines setting errno). See the bug for details.

BUG=392764

Review URL: https://codereview.chromium.org/426633005

git-svn-id: svn://svn.chromium.org/blink/trunk@179182 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -1282,9 +1282,6 @@ crbug.com/392706 virtual/threaded/animations/play-state-initially-paused.html [
 # V8 3.28.19
 crbug.com/392762 fast/js/nested-object-gc.html [ Pass Crash ]
 
-# Linux32 only. There seems to be no way to selectively specify Linux32, so marking as flaky (it actually isn't).
-crbug.com/392764 [ Linux ] webaudio/distance-linear.html [ Pass Failure ]
-
 # Flaky
 crbug.com/395127 http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]
 

third_party/WebKit/LayoutTests/webaudio/resources/distance-model-testing.js

@@ -129,7 +129,7 @@ function checkDistanceResult(model) {
         // The max allowed error between the actual gain and the expected
         // value.  This is determined experimentally.  Set to 0 to see what
         // the actual errors are.
-        var maxAllowedError = 2.3e-6;
+        var maxAllowedError = 3.3e-6;
    
         var success = true;