cc: Renamed approximate{BytesUsed,OpCount} in paint op buffer.

cc/paint/display_item_list.cc

Index: cc/paint/display_item_list.cc
diff --git a/cc/paint/display_item_list.cc b/cc/paint/display_item_list.cc
index 5f6fae6f334358a30d0fc05eb4c04eda7f1aab05..e656f60d4cb3f535c27842f3505002c2d64bb115 100644
--- a/cc/paint/display_item_list.cc
+++ b/cc/paint/display_item_list.cc
@@ -179,7 +179,7 @@ static bool MergeAndDrawIfPossible(const CompositingDisplayItem& save_item,
   // relevant here and that lcd text is preserved post merge, but I haven't
   // tested that.
   const PaintRecord* record = draw_item.picture.get();
-  if (record->approximateOpCount() != 1)
+  if (record->size() != 1u)
     return false;
 
   const PaintOp* op = record->GetFirstOp();
@@ -255,8 +255,8 @@ bool DisplayItemList::IsSuitableForGpuRasterization() const {
   return all_items_are_suitable_for_gpu_rasterization_;
 }
 
-int DisplayItemList::ApproximateOpCount() const {
-  return approximate_op_count_;
+size_t DisplayItemList::OpCount() const {
+  return op_count_;
 }
 
 size_t DisplayItemList::ApproximateMemoryUsage() const {
@@ -315,7 +315,7 @@ size_t DisplayItemList::ApproximateMemoryUsage() const {
 }
 
 bool DisplayItemList::ShouldBeAnalyzedForSolidColor() const {
-  return ApproximateOpCount() <= kOpCountThatIsOkToAnalyze;
+  return OpCount() <= kOpCountThatIsOkToAnalyze;
 }
 
 void DisplayItemList::EmitTraceSnapshot() const {