Notify OverscrollController of gesture events in plugins.

content/browser/renderer_host/overscroll_controller.h

Index: content/browser/renderer_host/overscroll_controller.h
diff --git a/content/browser/renderer_host/overscroll_controller.h b/content/browser/renderer_host/overscroll_controller.h
index 4e6134d91f0415908a581a74d95535718a64385e..ebb9fc828d7277f38b606fa3fc141bb2207567a8 100644
--- a/content/browser/renderer_host/overscroll_controller.h
+++ b/content/browser/renderer_host/overscroll_controller.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebGestureEvent.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 
@@ -38,8 +39,11 @@ enum class OverscrollSource {
 // status accordingly.
 class OverscrollController {
  public:
-  OverscrollController();
-  virtual ~OverscrollController();
+  // Exported for testing.
+  // TODO(mcnee): Tests needing CONTENT_EXPORT are BrowserPlugin specific.
+  // Remove after removing BrowserPlugin (crbug.com/533069).
+  CONTENT_EXPORT OverscrollController();
+  CONTENT_EXPORT virtual ~OverscrollController();
 
   // This must be called when dispatching any event from the
   // RenderWidgetHostView so that the state of the overscroll gesture can be
@@ -49,7 +53,12 @@ class OverscrollController {
 
   // This must be called when the ACK for any event comes in. This updates the
   // overscroll gesture status as appropriate.
-  void ReceivedEventACK(const blink::WebInputEvent& event, bool processed);
+  // Virtual and exported for testing.
+  // TODO(mcnee): Tests needing CONTENT_EXPORT and virtual are BrowserPlugin
+  // specific. Remove after removing BrowserPlugin (crbug.com/533069).
+  CONTENT_EXPORT virtual void ReceivedEventACK(
+      const blink::WebInputEvent& event,
+      bool processed);
 
   // This must be called when a gesture event is filtered out and not sent to
   // the renderer.