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 218f70fe9f3dfa61695497b476055adf4a9d0b69..9d99d9996897093dda54b5170f981ce6b19a3b95 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -139,6 +139,7 @@
 #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"
@@ -4436,18 +4437,30 @@ void WebViewImpl::setVisibilityState(WebPageVisibilityState visibilityState,
 
 bool WebViewImpl::requestPointerLock()
 {
-    return m_client && m_client->requestPointerLock();
+    if (WebFrameWidget* widget = mainFrameImpl()->frameWidget()) {
+        if (WebWidgetClient* client = widget->client())
+            return client->requestPointerLock();
+    }
+
+    return false;
 }
 
 void WebViewImpl::requestPointerUnlock()
 {
-    if (m_client)
-        m_client->requestPointerUnlock();
+    if (WebFrameWidget* widget = mainFrameImpl()->frameWidget()) {
+        if (WebWidgetClient* client = widget->client())
+            client->requestPointerUnlock();
+    }
 }
 
 bool WebViewImpl::isPointerLocked()
 {
-    return m_client && m_client->isPointerLocked();
+    if (WebFrameWidget* widget = mainFrameImpl()->frameWidget()) {
+        if (WebWidgetClient* client = widget->client())
+            return client->isPointerLocked();
+    }
+
+    return false;
 }
 
 void WebViewImpl::pointerLockMouseEvent(const WebInputEvent& event)