Extract webkit_unit_tests from blink_web component.

third_party/WebKit/Source/web/ChromeClientImpl.h

Index: third_party/WebKit/Source/web/ChromeClientImpl.h
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.h b/third_party/WebKit/Source/web/ChromeClientImpl.h
index 61c6b7bacc9d46010bb6d71b4312749c51475583..5483e3070afc3ebb7bd1e2dcaa322dcae9ec201b 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.h
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.h
@@ -35,6 +35,7 @@
 #include "core/page/ChromeClient.h"
 #include "core/page/WindowFeatures.h"
 #include "public/web/WebNavigationPolicy.h"
+#include "web/WebExport.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
@@ -45,7 +46,7 @@ class WebViewImpl;
 struct WebCursorInfo;
 
 // Handles window-level notifications from core on behalf of a WebView.
-class ChromeClientImpl final : public ChromeClient {
+class WEB_EXPORT ChromeClientImpl final : public ChromeClient {
 public:
     static PassOwnPtrWillBeRawPtr<ChromeClientImpl> create(WebViewImpl*);
     ~ChromeClientImpl() override;