Initialize memory, remove valgrind supression, add transparency test.

BUG=166584

Review URL: https://chromiumcodereview.appspot.com/12151002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180101 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -6213,13 +6213,6 @@
    fun:_ZN11dom_storage19DomStorageNamespace24DeleteLocalStorageOriginERK4GURL
    fun:_ZN11dom_storage17DomStorageContext18DeleteLocalStorageERK4GURL
 }
-{
-   bug_166584
-   Memcheck:Uninitialized
-   fun:_ZN7testing8internal11CmpHelperEQIjjEENS_15AssertionResultEPKcS4_RKT_RKT0_
-   fun:_ZN7testing8internal8EqHelperILb0EE7CompareIjjEENS_15AssertionResultEPKcS6_RKT_RKT0_
-   fun:_ZN39SkBitmapOperationsTest_RotateImage_Test8TestBodyEv
-}
 {
    bug_166709
    Memcheck:Leak

ui/gfx/skbitmap_operations_unittest.cc

@@ -534,11 +534,13 @@ TEST(SkBitmapOperationsTest, RotateImage) {
   src.allocPixels();
 
   SkCanvas canvas(src);
+  src.eraseARGB(0, 0, 0, 0);
   SkRegion region;
 
   region.setRect(0, 0, src_w / 2, src_h / 2);
   canvas.setClipRegion(region);
-  canvas.drawColor(SK_ColorRED, SkXfermode::kSrc_Mode);
+  // This region is a semi-transparent red to test non-opaque pixels.
+  canvas.drawColor(0x1FFF0000, SkXfermode::kSrc_Mode);
   region.setRect(src_w / 2, 0, src_w, src_h / 2);
   canvas.setClipRegion(region);
   canvas.drawColor(SK_ColorBLUE, SkXfermode::kSrc_Mode);