Remove unused WebWindowFeatures from popup blocker, reducing WebString use in browser

chrome/renderer/chrome_render_view_observer.h

Index: chrome/renderer/chrome_render_view_observer.h
diff --git a/chrome/renderer/chrome_render_view_observer.h b/chrome/renderer/chrome_render_view_observer.h
index af5de5042bdc51e64f320351c03e16b1b2d0204c..39c24ddaa97cf0fcdd7e6e7e27dbb05931a43c93 100644
--- a/chrome/renderer/chrome_render_view_observer.h
+++ b/chrome/renderer/chrome_render_view_observer.h
@@ -17,10 +17,6 @@
 #include "extensions/features/features.h"
 #include "url/gurl.h"
 
-namespace blink {
-struct WebWindowFeatures;
-}
-
 namespace web_cache {
 class WebCacheImpl;
 }
@@ -55,7 +51,7 @@ class ChromeRenderViewObserver : public content::RenderViewObserver {
                                     bool animate);
 #endif
   void OnGetWebApplicationInfo();
-  void OnSetWindowFeatures(const blink::WebWindowFeatures& window_features);
+  void OnSetWindowFeatures();
 
   // Determines if a host is in the strict security host set.
   bool IsStrictSecurityHost(const std::string& host);