cc: Add checker-imaging support to TileManager.

skia/ext/skia_utils_base.cc

 // Copyright (c) 2013 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 <stdint.h>
 
+#include "base/numerics/safe_math.h"
 #include "skia/ext/skia_utils_base.h"
 #include "third_party/skia/include/core/SkFontLCDConfig.h"
 
 namespace skia {
 
 bool ReadSkString(base::PickleIterator* iter, SkString* str) {
   int reply_length;
   const char* reply_text;
 
   if (!iter->ReadData(&reply_text, &reply_length))
@@ skipping 77 matching lines @@
   if (SkFontLCDConfig::kBGR_LCDOrder == order) {
     index |= 1;
   }
   if (SkFontLCDConfig::kVertical_LCDOrientation ==
       SkFontLCDConfig::GetSubpixelOrientation()) {
     index |= 2;
   }
   return gGeo[index];
 }
 
+size_t SafeSizeOfImage(const SkImage* image) {

[vmpstr, 2017/02/17 19:08:49]

Can you extract this as a separate patch and change the places that already do
this (software image decode cache)?

[Khushal, 2017/02/17 19:10:29]

Since I've already added it here, how about starting with using it in the new
code and then updating other places in the next patch?

+  base::CheckedNumeric<size_t> checked_size = 4;
+  checked_size *= image->width();
+  checked_size *= image->height();
+  return checked_size.ValueOrDefault(std::numeric_limits<size_t>::max());
+}
+
 }  // namespace skia