Load v8 snapshots directly from APK (and store them uncompressed)

base/files/memory_mapped_file.cc

Index: base/files/memory_mapped_file.cc
diff --git a/base/files/memory_mapped_file.cc b/base/files/memory_mapped_file.cc
index 891fcffc4cb434b74729657b7981a400729f2e61..1a22bb03df02ede73606bacd402ed52e953a3f16 100644
--- a/base/files/memory_mapped_file.cc
+++ b/base/files/memory_mapped_file.cc
@@ -16,10 +16,11 @@ const MemoryMappedFile::Region MemoryMappedFile::Region::kWholeFile(
 MemoryMappedFile::Region::Region(base::LinkerInitialized) : offset(0), size(0) {
 }
 
+MemoryMappedFile::Region::Region() : offset(0), size(0) {
+}
+
 MemoryMappedFile::Region::Region(int64 offset, int64 size)
     : offset(offset), size(size) {
-  DCHECK_GE(offset, 0);
-  DCHECK_GT(size, 0);
 }
 
 bool MemoryMappedFile::Region::operator==(