Expose IsSolidColor and write units tests

cc/resources/picture.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/picture.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
@@ skipping 185 matching lines @@
   // TODO(alokp): SkPicture::suitableForGpuRasterization needs a GrContext.
   // Ideally this GrContext should be the same as that for rasterizing this
   // picture. But we are on the main thread while the rasterization context
   // may be on the compositor or raster thread.
   // SkPicture::suitableForGpuRasterization is not implemented yet.
   // Pass a NULL context for now and discuss with skia folks if the context
   // is really needed.
   return picture_->suitableForGpuRasterization(NULL);
 }
 
+int Picture::ApproximateOpCount() const {
+  DCHECK(picture_);
+  return picture_->approximateOpCount();
+}
+
 bool Picture::HasText() const {
   DCHECK(picture_);
   return picture_->hasText();
 }
 
 void Picture::Record(ContentLayerClient* painter,
                      const SkTileGridFactory::TileGridInfo& tile_grid_info,
                      RecordingMode recording_mode) {
   TRACE_EVENT2("cc",
                "Picture::Record",
@@ skipping 340 matching lines @@
   scoped_refptr<base::debug::TracedValue> record_data =
       new base::debug::TracedValue();
   TracedValue::SetIDRef(this, record_data.get(), "picture_id");
   record_data->BeginArray("layer_rect");
   MathUtil::AddToTracedValue(layer_rect_, record_data.get());
   record_data->EndArray();
   return record_data;
 }
 
 }  // namespace cc