rolling back the experimental rollbacks in r2178-2179

git-svn-id: http://skia.googlecode.com/svn/trunk@2180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Debugger/DebuggerContentView.cpp b/experimental/Debugger/DebuggerContentView.cpp
index 925c372..a5f1c0c 100644
--- a/experimental/Debugger/DebuggerContentView.cpp
+++ b/experimental/Debugger/DebuggerContentView.cpp
@@ -43,7 +43,7 @@
             int offset = 0;
             int frameBound = 0;
             size_t bytesRead;
-            while (offset < size) {
+            while (static_cast<unsigned>(offset) < size) {
                 SkGPipeReader::Status s = dumpReader->playback(data + offset, 
                                                                size - offset, 
                                                                &bytesRead,