Fix crash in fast/frames/iframe-access-screen-of-deleted.html

This is a new layout test and triggers a crash inside screenRect() by
accessing the null page pointer. Other platform implementations perform
a null check on page in this function, so we now do the same to prevent
the crash.

Change-Id: I2403d7adc157daae69f6fb53bbbf212d9d04341c

1 files changed, 6 insertions, 0 deletions

diff --git a/WebCore/platform/android/ScreenAndroid.cpp b/WebCore/platform/android/ScreenAndroid.cpp
index 21df08a..70cf794 100644
--- a/WebCore/platform/android/ScreenAndroid.cpp
+++ b/WebCore/platform/android/ScreenAndroid.cpp
@@ -68,6 +68,9 @@ bool screenIsMonochrome(Widget* page)
 // the accuracy of these number are not too important.
 FloatRect screenRect(Widget* page)
 {
+    if (!page)
+        return FloatRect();
+
     IntRect rect = page->root()->platformWidget()->getBounds();
     return FloatRect(0.0, 0.0, rect.width(), rect.height());
 }
@@ -76,6 +79,9 @@ FloatRect screenRect(Widget* page)
 // to position and resize windows (usually to full screen). 
 FloatRect screenAvailableRect(Widget* page)
 {
+    if (!page)
+        return FloatRect();
+
     IntRect rect = page->root()->platformWidget()->getBounds();
     return FloatRect(0.0, 0.0, rect.width(), rect.height());
 }