Fix alignment of <input> elements with overflow

Source/core/rendering/RenderTextControl.h

Index: Source/core/rendering/RenderTextControl.h
diff --git a/Source/core/rendering/RenderTextControl.h b/Source/core/rendering/RenderTextControl.h
index baf8e77ba35e2b782076c8811753f267a8c74362..e4af77a46ea2e19fb6bb4205df9a2b9358b7774c 100644
--- a/Source/core/rendering/RenderTextControl.h
+++ b/Source/core/rendering/RenderTextControl.h
@@ -64,6 +64,11 @@ protected:
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
     virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&);
 
+    // We need to override this function because we don't want overflow:hidden on an <input>
+    // to affect the baseline calculation. This is necessary because we are an inline-block
+    // element as an implementation detail which would normally be affected by this.
+    virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return lastLineBoxBaseline(direction); }
+
 private:
     virtual const char* renderName() const { return "RenderTextControl"; }
     virtual bool isTextControl() const { return true; }