cc: Add checker-imaging support to TileManager.

skia/ext/skia_utils_base.cc

Index: skia/ext/skia_utils_base.cc
diff --git a/skia/ext/skia_utils_base.cc b/skia/ext/skia_utils_base.cc
index c56730bd9bc8f0b1c294617d2ab4e1829aca11d4..83250e17cd752b3a3035337f2de11eb0cd4544f3 100644
--- a/skia/ext/skia_utils_base.cc
+++ b/skia/ext/skia_utils_base.cc
@@ -4,6 +4,7 @@
 
 #include <stdint.h>
 
+#include "base/numerics/safe_math.h"
 #include "skia/ext/skia_utils_base.h"
 #include "third_party/skia/include/core/SkFontLCDConfig.h"
 
@@ -101,5 +102,12 @@ SkPixelGeometry ComputeDefaultPixelGeometry() {
   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