Notify OverscrollController of gesture events in plugins.

content/public/test/browser_test_utils.h

Index: content/public/test/browser_test_utils.h
diff --git a/content/public/test/browser_test_utils.h b/content/public/test/browser_test_utils.h
index 4122a90711a5abfdb751c244b17710fe53460231..fdbacfee38d3b46ea765e39337a8af1301af93d3 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -850,6 +850,25 @@ class PwnMessageHelper {
   DISALLOW_COPY_AND_ASSIGN(PwnMessageHelper);
 };
 
+#if defined(USE_AURA)
+// Mock of an OverscrollController so we can inspect the scroll events that it
+// receives. Note that this is only a partial mock as the methods of a real
+// OverscrollController are being invoked.
+// TODO(mcnee): Tests needing this are BrowserPlugin specific. Remove after
+// removing BrowserPlugin (crbug.com/533069).
+class MockOverscrollController {
+ public:
+  // Creates a mock and installs it on the given RenderWidgetHostViewAura.
+  // The returned mock is owned by the RWHVA.
+  static MockOverscrollController* Create(RenderWidgetHostView* rwhv);
+
+  virtual ~MockOverscrollController() {}
+
+  // Waits until the mock receives a consumed GestureScrollUpdate.
+  virtual void WaitForConsumedScroll() = 0;
+};
+#endif  // defined(USE_AURA)
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_