[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index d0e9bbb04981714c12a5a1f00027e51b88fbea6a..648551eacbeadc321671d3fe43b36e3649d48413 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -1836,6 +1836,11 @@ WebViewImpl* WebLocalFrameImpl::viewImpl() const
     return WebViewImpl::fromPage(frame()->page());
 }
 
+WebDevToolsAgentImpl* WebLocalFrameImpl::devToolsAgentImpl() const
+{
+    return m_devToolsAgent.get();
+}
+
 WebDataSourceImpl* WebLocalFrameImpl::dataSourceImpl() const
 {
     return static_cast<WebDataSourceImpl*>(dataSource());