Revert of Require WebLocalFrame to be created with a non-null client

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

Index: third_party/WebKit/Source/web/tests/WebFrameTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
index a0ab351eeb49445290da2a7aedd72c801d057ff2..b194b12acc238adb096946b664ad9b1ea0dbd8bc 100644
--- a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
@@ -5889,11 +5889,11 @@
     int willSendRequestCallCount() const { return m_willSendRequestCallCount; }
     int childFrameCreationCount() const { return m_childFrameCreationCount; }
 
-    virtual WebLocalFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString&, const WebString&, WebSandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties)
+    virtual WebFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString&, const WebString&, WebSandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties)
     {
         DCHECK(m_childClient);
         m_childFrameCreationCount++;
-        WebLocalFrame* frame = WebLocalFrame::create(scope, m_childClient);
+        WebFrame* frame = WebLocalFrame::create(scope, m_childClient);
         parent->appendChild(frame);
         return frame;
     }
@@ -6277,10 +6277,10 @@
 public:
     FailCreateChildFrame() : m_callCount(0) { }
 
-    WebLocalFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& frameName, const WebString& frameUniqueName, WebSandboxFlags sandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties) override
+    WebFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& frameName, const WebString& frameUniqueName, WebSandboxFlags sandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties) override
     {
         ++m_callCount;
-        return nullptr;
+        return 0;
     }
 
     int callCount() const { return m_callCount; }