Remove a bunch of unused frameHost() methods

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index ea9df469f02ccd75c7b6316efdc13354607fdc46..83ac39074f9b1e2d498b3f827d279ed4c99de0c0 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -108,7 +108,6 @@ class ExceptionState;
 class FloatQuad;
 class FloatRect;
 class FormController;
-class FrameHost;
 class FrameRequestCallback;
 class FrameView;
 class HTMLAllCollection;
@@ -471,7 +470,6 @@ class CORE_EXPORT Document : public ContainerNode,
 
   FrameView* view() const;                       // can be null
   LocalFrame* frame() const { return m_frame; }  // can be null
-  FrameHost* frameHost() const;                  // can be null
   Page* page() const;                            // can be null
   Settings* settings() const;                    // can be null