Implement pointer lock API for out-of-process iframes.

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index dbce5b06b65f7e4ff4ef9e4783670e765bcfada8..baa9a6e3bbf3368cce2ab5009bf8c0870838083c 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -138,6 +138,7 @@
 #include "public/web/WebElement.h"
 #include "public/web/WebFrame.h"
 #include "public/web/WebFrameClient.h"
+#include "public/web/WebFrameWidget.h"
 #include "public/web/WebHitTestResult.h"
 #include "public/web/WebInputElement.h"
 #include "public/web/WebMeaningfulLayout.h"
@@ -4426,18 +4427,18 @@ void WebViewImpl::setVisibilityState(WebPageVisibilityState visibilityState,
 
 bool WebViewImpl::requestPointerLock()
 {
-    return m_client && m_client->requestPointerLock();
+    return mainFrameImpl()->frameWidget() && mainFrameImpl()->frameWidget()->client() && mainFrameImpl()->frameWidget()->client()->requestPointerLock();

[scheib, 2016/05/19 00:38:58]

These && chains are too long.. let's do:

if (widget = mainFrameImpl()->frameWidget()) {
  if (client = ...) {
    client->requestPointerLock();
  }
}

[lfg, 2016/05/19 23:54:06]

Done.

 }
 
 void WebViewImpl::requestPointerUnlock()
 {
-    if (m_client)
-        m_client->requestPointerUnlock();
+    if (mainFrameImpl()->frameWidget() && mainFrameImpl()->frameWidget()->client())
+        mainFrameImpl()->frameWidget()->client()->requestPointerUnlock();
 }
 
 bool WebViewImpl::isPointerLocked()
 {
-    return m_client && m_client->isPointerLocked();
+    return mainFrameImpl()->frameWidget() && mainFrameImpl()->frameWidget()->client() && mainFrameImpl()->frameWidget()->client()->isPointerLocked();
 }
 
 void WebViewImpl::pointerLockMouseEvent(const WebInputEvent& event)