Increase heap limit for DevTools isolate.

third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp

Index: third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp b/third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp
index 637f5d8cd273ef2c0efcffa263ac2d9ab098d3e6..935c30d2b4bc2ada948b3e98d901ecd1b562bb4e 100644
--- a/third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp
+++ b/third_party/WebKit/Source/web/WebDevToolsFrontendImpl.cpp
@@ -65,6 +65,9 @@ WebDevToolsFrontendImpl::~WebDevToolsFrontendImpl() {
 void WebDevToolsFrontendImpl::didClearWindowObject(WebLocalFrameImpl* frame) {
   if (m_webFrame == frame) {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    // Use higher limit for DevTools isolate so that it does not OOM when
+    // profiling large heaps.
+    isolate->IncreaseHeapLimitForDebugging();
     ScriptState* scriptState = ScriptState::forMainWorld(m_webFrame->frame());
     DCHECK(scriptState);
     ScriptState::Scope scope(scriptState);