cc: Add software renderer pixel tests

cc/test/pixel_comparator.cc

Index: cc/test/pixel_comparator.cc
diff --git a/cc/test/pixel_comparator.cc b/cc/test/pixel_comparator.cc
index 53b1f9df5240097fe44bf4ab2135c3f6aa952157..a44d91519cd6b4babb2f06e42b7fb85ce53f1d46 100644
--- a/cc/test/pixel_comparator.cc
+++ b/cc/test/pixel_comparator.cc
@@ -114,18 +114,6 @@ bool FuzzyPixelComparator::Compare(const SkBitmap& actual_bmp,
       if (actual_color != expected_color) {
         ++error_pixels_count;
 
-        LOG(ERROR) << "Pixel error at x=" << x << " y=" << y << "; "

[enne (OOO), 2013/04/28 02:56:55]

This is spammy.  No errors should be logged unless the test is going to fail.

-                   << "actual RGBA=("
-                   << SkColorGetR(actual_color) << ","
-                   << SkColorGetG(actual_color) << ","
-                   << SkColorGetB(actual_color) << ","
-                   << SkColorGetA(actual_color) << "); "
-                   << "expected RGBA=("
-                   << SkColorGetR(expected_color) << ","
-                   << SkColorGetG(expected_color) << ","
-                   << SkColorGetB(expected_color) << ","
-                   << SkColorGetA(expected_color) << ")";
-
         // Compute per channel errors
         int error_r = SkColorGetR(actual_color) - SkColorGetR(expected_color);
         int error_g = SkColorGetG(actual_color) - SkColorGetG(expected_color);