add a second interface to the resizer to exactly match what Chrome expects.

src/core/SkBitmapScaler.cpp

 #include "SkBitmapScaler.h"
 #include "SkBitmapFilter.h"
 #include "SkRect.h"
 #include "SkTArray.h"
 #include "SkErrorInternals.h"
 #include "SkConvolver.h"
 
 // SkResizeFilter ----------------------------------------------------------------
 
 // Encapsulates computation and storage of the filters required for one complete
@@ skipping 299 matching lines @@
         !source.isOpaque(), filter.xFilter(), filter.yFilter(),
         static_cast<int>(result.rowBytes()),
         static_cast<unsigned char*>(result.getPixels()),
         convolveProcs, true);
 
     *resultPtr = result;
     resultPtr->lockPixels();
     SkASSERT(NULL != resultPtr->getPixels());
     return true;
 }
+
+// static -- simpler interface to the resizer; returns a default bitmap if scaling
+// fails for any reason.  This is the interface that Chrome expects.
+SkBitmap SkBitmapScaler::Resize(const SkBitmap& source,
+                                ResizeMethod method,
+                                float destWidth, float destHeight,
+                                SkBitmap::Allocator* allocator) {
+  SkBitmap result;
+  if (!Resize(&result, source, method, destWidth, destHeight, allocator)) {
+    return SkBitmap();
+  }
+  return result;
+}