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

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 35d5d5ee5cd59a950e9271c596e920f3a4513bbb..dce13caa9a574275ca3df2f613e59d51c2db80ce 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp
@@ -96,6 +96,13 @@ static void reportFatalErrorInMainThread(const char* location, const char* messa
     CRASH();
 }
 
+static void reportOOMErrorInMainThread(const char* location, bool isJsHeap)
+{
+    int memoryUsageMB = Platform::current()->actualMemoryUsageMB();
+    printf("V8 %s OOM: (%s).  Current memory usage: %d MB\n", isJsHeap ? "javascript" : "process", location, memoryUsageMB);

[haraken, 2016/07/15 16:01:23]

We should avoid using printf. Use WTF_LOG instead.

[Will Harris, 2016/07/15 16:11:41]

Done. WTF_LOG is deprecated so I used VLOG.

+    OOM_CRASH();
+}
+
 static String extractMessageForConsole(v8::Isolate* isolate, v8::Local<v8::Value> data)
 {
     if (V8DOMWrapper::isWrapper(isolate, data)) {
@@ -356,6 +363,7 @@ void V8Initializer::initializeMainThread()
 
     initializeV8Common(isolate);
 
+    isolate->SetOOMErrorHandler(reportOOMErrorInMainThread);
     isolate->SetFatalErrorHandler(reportFatalErrorInMainThread);
     isolate->AddMessageListener(messageHandlerInMainThread);
     isolate->SetFailedAccessCheckCallbackFunction(failedAccessCheckCallbackInMainThread);