Move cache clearing from AwRenderViewExt to AwRenderFrameExt.

android_webview/renderer/aw_render_frame_ext.h

Index: android_webview/renderer/aw_render_frame_ext.h
diff --git a/android_webview/renderer/aw_render_frame_ext.h b/android_webview/renderer/aw_render_frame_ext.h
index 09c9853ab58bfdea4facb9ae3b823d85b9d918d6..cb85969508349cd33840c110614b595a254b8f4a 100644
--- a/android_webview/renderer/aw_render_frame_ext.h
+++ b/android_webview/renderer/aw_render_frame_ext.h
@@ -10,6 +10,7 @@
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/geometry/size_f.h"
+#include "url/origin.h"
 
 namespace blink {
 enum WebMeaningfulLayout;
@@ -53,6 +54,8 @@ class AwRenderFrameExt : public content::RenderFrameObserver {
   blink::WebView* GetWebView();
   blink::WebFrameWidget* GetWebFrameWidget();
 
+  url::Origin last_origin_;
+
   DISALLOW_COPY_AND_ASSIGN(AwRenderFrameExt);
 };