Skia Debugger can now save modified pictures.

Review URL: https://codereview.appspot.com/6442055

git-svn-id: http://skia.googlecode.com/svn/trunk@4821 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/debugger/SkDebugCanvas.cpp b/debugger/SkDebugCanvas.cpp
index c5f0c2d..9510e65 100644
--- a/debugger/SkDebugCanvas.cpp
+++ b/debugger/SkDebugCanvas.cpp
@@ -29,7 +29,9 @@
 void SkDebugCanvas::draw(SkCanvas* canvas) {
     if(!commandVector.empty()) {
         for(it = commandVector.begin(); it != commandVector.end(); ++it) {
-            (*it)->execute(canvas);
+            if ((*it)->getVisibility()) {
+                (*it)->execute(canvas);
+            }
         }
     }
 }