Change random number generator for 'tests' to SkMWCRandom. Also removes some

unused headers and fixes a couple of bugs exposed by changing the random 
number generator:

First, the function SkMatrix::getMaxStretch() had an error where it was testing
the square of a number against near-zero. This led to it occasionally taking a
cheaper but imprecise path for computing the eigenvalues of the matrix. It's 
been replaced with a check against the square of SK_ScalarNearlyZero. 

The second case was a failure in ClipStackTest, where it hit the rare case of 
a practically empty clip stack (it has a single Union) and we set a tight 
bounds. The bounds rect doesn't get set by GrReducedClip::ReduceClipStack() in 
this case, so when it clips the reduced stack it's clipping against garbage, 
and the resulting regions don't match. The solution is to initialize the 
tightBounds rect.


git-svn-id: http://skia.googlecode.com/svn/trunk@7952 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/MatrixTest.cpp b/tests/MatrixTest.cpp
index 56292dc525..022e4012c7 100644
--- a/tests/MatrixTest.cpp
+++ b/tests/MatrixTest.cpp
@@ -168,7 +168,7 @@ static void test_matrix_max_stretch(skiatest::Reporter* reporter) {
         bool invertable = mats[i].invert(&mats[i + SK_ARRAY_COUNT(baseMats)]);
         REPORTER_ASSERT(reporter, invertable);
     }
-    SkRandom rand;
+    SkMWCRandom rand;
     for (int m = 0; m < 1000; ++m) {
         SkMatrix mat;
         mat.reset();