Remove defunct WebFrameClient::initializeChildFrame method.

This has moved to WebRemoteFrameClient.

BUG=none

Review URL: https://codereview.chromium.org/1309363005

git-svn-id: svn://svn.chromium.org/blink/trunk@201931 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/web/WebFrameClient.h

@@ -569,9 +569,6 @@ public:
     // Extensions3D.h in WebCore/platform/graphics).
     virtual void didLoseWebGLContext(WebLocalFrame*, int) { }
 
-    // Send initial drawing parameters to a child frame that is being rendered out of process.
-    virtual void initializeChildFrame(const WebRect& frameRect, float scaleFactor) { }
-
 
     // Screen Orientation --------------------------------------------------