Switch the inheritance of WebViewClient from WebWidgetClient to protected.

third_party/WebKit/Source/web/tests/FrameTestHelpers.h

Index: third_party/WebKit/Source/web/tests/FrameTestHelpers.h
diff --git a/third_party/WebKit/Source/web/tests/FrameTestHelpers.h b/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
index adba60b772bb802390f1611a581d987b0db876b4..aa62a0bcb330dc6b5678d8e1e7fe7a2e23611f64 100644
--- a/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
+++ b/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
@@ -59,6 +59,7 @@ enum class WebCachePolicy;
 namespace FrameTestHelpers {
 
 class TestWebFrameClient;
+using TestWebWidgetClient = WebWidgetClient;
 
 // Loads a url into the specified WebFrame for testing purposes. Pumps any
 // pending resource requests, as well as waiting for the threaded parser to
@@ -142,14 +143,14 @@ public:
     // Creates and initializes the WebView. Implicitly calls reset() first. If
     // a WebFrameClient or a WebViewClient are passed in, they must outlive the
     // WebViewHelper.
-    WebViewImpl* initializeWithOpener(WebFrame* opener, bool enableJavascript = false, TestWebFrameClient* = nullptr, TestWebViewClient* = nullptr, void (*updateSettingsFunc)(WebSettings*) = nullptr);
+    WebViewImpl* initializeWithOpener(WebFrame* opener, bool enableJavascript = false, TestWebFrameClient* = nullptr, TestWebViewClient* = nullptr, TestWebWidgetClient* = nullptr, void (*updateSettingsFunc)(WebSettings*) = nullptr);
 
     // Same as initializeWithOpener(), but always sets the opener to null.
-    WebViewImpl* initialize(bool enableJavascript = false, TestWebFrameClient* = 0, TestWebViewClient* = 0, void (*updateSettingsFunc)(WebSettings*) = 0);
+    WebViewImpl* initialize(bool enableJavascript = false, TestWebFrameClient* = nullptr, TestWebViewClient* = nullptr, TestWebWidgetClient* = nullptr, void (*updateSettingsFunc)(WebSettings*) = 0);
 
     // Same as initialize() but also performs the initial load of the url. Only
     // returns once the load is complete.
-    WebViewImpl* initializeAndLoad(const std::string& url, bool enableJavascript = false, TestWebFrameClient* = 0, TestWebViewClient* = 0, void (*updateSettingsFunc)(WebSettings*) = 0);
+    WebViewImpl* initializeAndLoad(const std::string& url, bool enableJavascript = false, TestWebFrameClient* = nullptr, TestWebViewClient* = nullptr, TestWebWidgetClient* = nullptr, void (*updateSettingsFunc)(WebSettings*) = 0);
 
     void resize(WebSize);