Allow out-of-process iframes to update the mouse cursor

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index 557722836f82fc77c9810d39fe8cf57e3be3ddcd..e1347599ded11f36e0cb22c9e5f2dec38d1da23d 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -662,13 +662,13 @@ Cursor ChromeClientImpl::lastSetCursorForTesting() const
     return m_lastSetMouseCursorForTesting;
 }
 
-void ChromeClientImpl::setCursor(const Cursor& cursor)
+void ChromeClientImpl::setCursor(const Cursor& cursor, LocalFrame* localRoot)
 {
     m_lastSetMouseCursorForTesting = cursor;
-    setCursor(WebCursorInfo(cursor));
+    setCursor(WebCursorInfo(cursor), localRoot);
 }
 
-void ChromeClientImpl::setCursor(const WebCursorInfo& cursor)
+void ChromeClientImpl::setCursor(const WebCursorInfo& cursor, LocalFrame* localRoot)
 {
     if (m_cursorOverridden)
         return;
@@ -679,13 +679,24 @@ void ChromeClientImpl::setCursor(const WebCursorInfo& cursor)
     if (m_webView->hasOpenedPopup())
         return;
 #endif
-    if (m_webView->client())
+    if (!m_webView->client())
+        return;
+    // FIXME: For top-level frames we still use the WebView as a WebWidget. This

[nasko, 2015/10/15 17:06:54]

Blink now uses // TODO(username): comments.

[kenrb, 2015/10/15 17:12:55]

Done.

+    // special case will be removed when top-level frames get WebFrameWidgets.
+    if (localRoot->isMainFrame()) {
         m_webView->client()->didChangeCursor(cursor);
+    } else {
+        WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(localRoot);
+        ASSERT(webFrame);
+        ASSERT(webFrame->frameWidget());
+        if (toWebFrameWidgetImpl(webFrame->frameWidget())->client())
+            toWebFrameWidgetImpl(webFrame->frameWidget())->client()->didChangeCursor(cursor);
+    }
 }
 
 void ChromeClientImpl::setCursorForPlugin(const WebCursorInfo& cursor)
 {
-    setCursor(cursor);
+    setCursor(cursor, m_webView->page()->deprecatedLocalMainFrame());
 }
 
 void ChromeClientImpl::setCursorOverridden(bool overridden)