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/Writer32Test.cpp b/tests/Writer32Test.cpp
index 33777a1af7..498be9cb81 100644
--- a/tests/Writer32Test.cpp
+++ b/tests/Writer32Test.cpp
@@ -134,7 +134,7 @@ static void testWritePad(skiatest::Reporter* reporter, SkWriter32* writer) {
 
     SkAutoMalloc originalData(dataSize);
     {
-        SkRandom rand(0);
+        SkMWCRandom rand(0);
         uint32_t* ptr = static_cast<uint32_t*>(originalData.get());
         uint32_t* stop = ptr + (dataSize>>2);
         while (ptr < stop) {