Change OOMs to raise custom exception rather than breakpoint on Windows.

third_party/WebKit/Source/wtf/allocator/PartitionAlloc.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 290 matching lines @@
         PartitionBucket* bucket = &root->buckets[i];
         foundLeak |= partitionAllocShutdownBucket(bucket);
     }
     foundLeak |= partitionAllocBaseShutdown(root);
     return !foundLeak;
 }
 
 #if !CPU(64BIT)
 static NEVER_INLINE void partitionOutOfMemoryWithLotsOfUncommitedPages()
 {
-    IMMEDIATE_CRASH();
+    OOM_CRASH();
 }
 #endif
 
 static NEVER_INLINE void partitionOutOfMemory(const PartitionRootBase* root)
 {
 #if !CPU(64BIT)
     // Check whether this OOM is due to a lot of super pages that are allocated
     // but not committed, probably due to http://crbug.com/421387.
     if (root->totalSizeOfSuperPages + root->totalSizeOfDirectMappedPages - root->totalSizeOfCommittedPages > kReasonableSizeOfUnusedPages) {
         partitionOutOfMemoryWithLotsOfUncommitedPages();
     }
 #endif
     if (PartitionRootBase::gOomHandlingFunction)
         (*PartitionRootBase::gOomHandlingFunction)();
-    IMMEDIATE_CRASH();
+    OOM_CRASH();
 }
 
 static NEVER_INLINE void partitionExcessiveAllocationSize()
 {
-    IMMEDIATE_CRASH();
+    OOM_CRASH();
 }
 
 static NEVER_INLINE void partitionBucketFull()
 {
-    IMMEDIATE_CRASH();
+    OOM_CRASH();
 }
 
 // partitionPageStateIs*
 // Note that it's only valid to call these functions on pages found on one of
 // the page lists. Specifically, you can't call these functions on full pages
 // that were detached from the active list.
 static bool ALWAYS_INLINE partitionPageStateIsActive(const PartitionPage* page)
 {
     ASSERT(page != &PartitionRootGeneric::gSeedPage);
     ASSERT(!page->pageOffset);
@@ skipping 1058 matching lines @@
             partitionStats.totalDiscardableBytes += memoryStats[i].discardableBytes;
             if (!isLightDump)
                 partitionStatsDumper->partitionsDumpBucketStats(partitionName, &memoryStats[i]);
         }
     }
     partitionStatsDumper->partitionDumpTotals(partitionName, &partitionStats);
 }
 
 } // namespace WTF