Move didFocus from WebWidgetClient to WebViewClient.

third_party/WebKit/public/web/WebViewClient.h

Index: third_party/WebKit/public/web/WebViewClient.h
diff --git a/third_party/WebKit/public/web/WebViewClient.h b/third_party/WebKit/public/web/WebViewClient.h
index ca930fa829f7d2e0f7561dab60df466aa4cfbec1..57d6d735a0e11107c408d943c5919519b22915c8 100644
--- a/third_party/WebKit/public/web/WebViewClient.h
+++ b/third_party/WebKit/public/web/WebViewClient.h
@@ -194,6 +194,8 @@ public:
     // Called when the View has changed size as a result of an auto-resize.
     virtual void didAutoResize(const WebSize& newSize) {}
 
+    // Called when the View acquires focus.
+    virtual void didFocus() {}
 
     // Session history -----------------------------------------------------
 
@@ -260,7 +262,6 @@ public:
     void closeWidgetSoon() override {}
     void convertViewportToWindow(WebRect* rect) override {}
     void convertWindowToViewport(WebFloatRect* rect) override {}
-    void didFocus() override {}
     void didHandleGestureEvent(const WebGestureEvent& event, bool eventCancelled) override {}
     void didInvalidateRect(const WebRect&) override {}
     void didOverscroll(const WebFloatSize& overscrollDelta, const WebFloatSize& accumulatedOverscroll, const WebFloatPoint& positionInViewport, const WebFloatSize& velocityInViewport) override {}