Implement a shell of FindRequestManager, and hook it up to WebContentsImpl.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 96a3feb63b6dbe947fb39dcc272eeb372bdedfe7..800d24ac2706249a19cf87fd4904663f9be417b9 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -707,6 +707,13 @@ class WebContents : public PageNavigator,
   CONTENT_EXPORT static WebContents* FromJavaWebContents(
       jobject jweb_contents_android);
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents() = 0;
+
+  // Selects and zooms to the find result nearest to the point (x,y) defined in
+  // find-in-page coordinates.
+  virtual void ActivateNearestFindResult(float x, float y) = 0;
+
+  // Requests the rects of the current find matches from the renderers.
+  virtual void RequestFindMatchRects(int current_version) = 0;
 #elif defined(OS_MACOSX)
   // Allowing other views disables optimizations which assume that only a single
   // WebContents is present.