[v8] don't crash when ArrayBuffer allocation fails

third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp b/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
index 60a08f45f17fb57d0187a7c66cb405651f2c4aff..6717eadd145ec477724062da6a022bd2886c47a4 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
@@ -329,17 +329,19 @@ static void initializeV8Common(v8::Isolate* isolate)
 namespace {
 
 class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+    // Allocate() methods return null to signal allocation failure to V8, which should respond by throwing
+    // a RangeError, per http://www.ecma-international.org/ecma-262/6.0/#sec-createbytedatablock.
     void* Allocate(size_t size) override
     {
         void* data;
-        WTF::ArrayBufferContents::allocateMemory(size, WTF::ArrayBufferContents::ZeroInitialize, data);
+        WTF::ArrayBufferContents::allocateMemoryOrNull(size, WTF::ArrayBufferContents::ZeroInitialize, data);
         return data;
     }
 
     void* AllocateUninitialized(size_t size) override
     {
         void* data;
-        WTF::ArrayBufferContents::allocateMemory(size, WTF::ArrayBufferContents::DontInitialize, data);
+        WTF::ArrayBufferContents::allocateMemoryOrNull(size, WTF::ArrayBufferContents::DontInitialize, data);
         return data;
     }