Add feature use counting for window.external.AddSearchProvider (Blink side).

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index b54487a2e59b265d948f17b59b67a28f91cd502d..22473b153a188850a12e783f021304d29ea362e2 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -119,6 +119,7 @@
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLFormElement.h"
@@ -2137,6 +2138,16 @@ void WebLocalFrameImpl::requestRunTask(WebSuspendableTask* task) const
     frame()->document()->postSuspendableTask(WebSuspendableTaskWrapper::create(adoptPtr(task)));
 }
 
+void WebLocalFrameImpl::didCallAddSearchProvider()
+{
+    UseCounter::count(frame(), UseCounter::ExternalAddSearchProvider);
+}
+
+void WebLocalFrameImpl::didCallIsSearchProviderInstalled()
+{
+    UseCounter::count(frame(), UseCounter::ExternalIsSearchProviderInstalled);
+}
+
 void WebLocalFrameImpl::willBeDetached()
 {
     if (m_devToolsAgent)