Make possible to check memory allocations inside chromium

base/process/memory.h

 // 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.
 
 #ifndef BASE_PROCESS_MEMORY_H_
 #define BASE_PROCESS_MEMORY_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/process/process_handle.h"
@@ skipping 43 matching lines @@
 // This adjusts /proc/<pid>/oom_score_adj so the Linux OOM killer will
 // prefer to kill certain process types over others. The range for the
 // adjustment is [-1000, 1000], with [0, 1000] being user accessible.
 // If the Linux system doesn't support the newer oom_score_adj range
 // of [0, 1000], then we revert to using the older oom_adj, and
 // translate the given value into [0, 15].  Some aliasing of values
 // may occur in that case, of course.
 BASE_EXPORT bool AdjustOOMScore(ProcessId process, int score);
 #endif
 
+// Special allocator functions for callers that want to check for OOM.
+// These will not abort if the allocation fails even if
+// EnableTerminationOnOutOfMemory has been called.
+// This can be useful for huge and/or unpredictable size memory allocations.
+// Please only use this if you really handle the case when the allocation
+// fails. Doing otherwise would risk security.
+// Return value tells whether the allocation succeeded. If it fails |result| is
+// set to NULL, otherwise it holds the memory address.
+BASE_EXPORT WARN_UNUSED_RESULT bool UncheckedMalloc(size_t size,
+                                                    void** result);
+BASE_EXPORT WARN_UNUSED_RESULT bool UncheckedCalloc(size_t num_items,
+                                                    size_t size,
+                                                    void** result);
+
+// TODO(b.kelemen): make Skia use the new interface and remove these.
 #if defined(OS_MACOSX)
-// Very large images or svg canvases can cause huge mallocs.  Skia
-// does tricks on tcmalloc-based systems to allow malloc to fail with
-// a NULL rather than hit the oom crasher.  This replicates that for
-// OSX.
-//
-// IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER,
-// YOUR CODE IS LIKELY TO BE REVERTED.  THANK YOU.
 BASE_EXPORT void* UncheckedMalloc(size_t size);
 BASE_EXPORT void* UncheckedCalloc(size_t num_items, size_t size);
-#endif  // defined(OS_MACOSX)
+#endif
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_MEMORY_H_