Have Frame::tree() return a reference

Have Frame::tree() return a reference

Have Frame::tree() return a reference as it can never return null.
This makes the calling code look safer.

BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=160216

[eseidel, 2013-10-21 19:05:25]

lgtm

[commit-bot: I haz the power, 2013-10-21 19:10:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/33353003/1

[commit-bot: I haz the power, 2013-10-22 00:28:51]

Retried try job too often on win_blink_rel for step(s) webkit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_blink_...

[commit-bot: I haz the power, 2013-10-22 13:19:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/33353003/1

[commit-bot: I haz the power, 2013-10-22 13:19:46]

Failed to apply patch for Source/core/frame/Frame.h:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file Source/core/frame/Frame.h
  Hunk #1 FAILED at 100.
  1 out of 2 hunks FAILED -- saving rejects to file
Source/core/frame/Frame.h.rej

Patch:       Source/core/frame/Frame.h
Index: Source/core/frame/Frame.h
diff --git a/Source/core/frame/Frame.h b/Source/core/frame/Frame.h
index
bd0dcce7ace83ca7e6fd8996f894864b276b1d8f..019f9dfc801b9e9c66f5facccc71422718805dd2
100644
--- a/Source/core/frame/Frame.h
+++ b/Source/core/frame/Frame.h
@@ -100,7 +100,7 @@ namespace WebCore {
         FrameLoader* loader() const;
         NavigationScheduler* navigationScheduler() const;
         FrameSelection& selection() const;
-        FrameTree* tree() const;
+        FrameTree& tree() const;
         AnimationController* animation() const;
         InputMethodController& inputMethodController() const;
         FetchContext& fetchContext() const { return loader()->fetchContext(); }
@@ -267,9 +267,9 @@ namespace WebCore {
         m_inViewSourceMode = mode;
     }
 
-    inline FrameTree* Frame::tree() const
+    inline FrameTree& Frame::tree() const
     {
-        return &m_treeNode;
+        return m_treeNode;
     }
 
     inline Page* Frame::page() const

[commit-bot: I haz the power, 2013-10-22 13:30:04]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/33353003/170001

[commit-bot: I haz the power, 2013-10-22 14:55:38]

Change committed as 160216