Implement the basic testing infrastructure for FindRequestManager.

content/browser/find_request_manager.h

Index: content/browser/find_request_manager.h
diff --git a/content/browser/find_request_manager.h b/content/browser/find_request_manager.h
index 0fa037eb79dc715bddb6a79c8bb0662649afd0fc..a76641b764a0853f843ea709308fa6d646db5c4d 100644
--- a/content/browser/find_request_manager.h
+++ b/content/browser/find_request_manager.h
@@ -8,6 +8,7 @@
 #include <set>
 #include <vector>
 
+#include "content/common/content_export.h"
 #include "content/public/common/stop_find_action.h"
 #include "third_party/WebKit/public/web/WebFindOptions.h"
 #include "ui/gfx/geometry/rect.h"
@@ -26,16 +27,16 @@ class WebContentsImpl;
 //
 // TODO(paulmeyer): FindRequestManager is currently incomplete and does not do
 // all of these things yet, but will soon.
-class FindRequestManager {
+class CONTENT_EXPORT FindRequestManager {
  public:
   explicit FindRequestManager(WebContentsImpl* web_contents);
-  ~FindRequestManager();
+  virtual ~FindRequestManager();

[nasko, 2016/04/18 21:02:39]

We no longer need these extra virtuals, as there is no more inheritance for
testing. FindRequestManager should remain unchanged in this CL, right?

[paulmeyer, 2016/04/19 15:15:00]

That's right. Done.

 
   // Initiates a find operation for |search_text| with the options specified in
   // |options|. |request_id| uniquely identifies the find request.
-  void Find(int request_id,
-            const base::string16& search_text,
-            const blink::WebFindOptions& options);
+  virtual void Find(int request_id,
+                    const base::string16& search_text,
+                    const blink::WebFindOptions& options);
 
   // Stops the active find session and clears the general highlighting of the
   // matches. |action| determines whether the last active match (if any) will be
@@ -67,7 +68,7 @@ class FindRequestManager {
                              const gfx::RectF& active_rect);
 #endif
 
- private:
+ protected:
   // An invalid ID. This value is invalid for any render process ID, render
   // frame ID, or find request ID.
   static const int kInvalidId;
@@ -101,7 +102,7 @@ class FindRequestManager {
   void Reset(const FindRequest& initial_request);
 
   // Send the find results (as they currently are) to the WebContents.
-  void NotifyFindReply(int request_id, bool final_update) const;
+  virtual void NotifyFindReply(int request_id, bool final_update) const;
 
 #if defined(OS_ANDROID)
   // Request the latest find match rects from a frame.