Defining new color constat for transparent color
Review URL: https://codereview.appspot.com/6901044

git-svn-id: http://skia.googlecode.com/svn/trunk@6696 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/debugger/SkDebugCanvas.cpp b/debugger/SkDebugCanvas.cpp
index af86a1e..03b57c3 100644
--- a/debugger/SkDebugCanvas.cpp
+++ b/debugger/SkDebugCanvas.cpp
@@ -101,7 +101,7 @@
             canvas->restore();
         }
         i = 0;
-        canvas->clear(0);
+        canvas->clear(SK_ColorTRANSPARENT);
         canvas->resetMatrix();
         SkRect rect = SkRect::MakeWH(SkIntToScalar(fWidth),
                                      SkIntToScalar(fHeight));