Make the constructor of a LayoutRect from an IntRect explicit.

Source/core/html/HTMLTextFormControlElementTest.cpp

Index: Source/core/html/HTMLTextFormControlElementTest.cpp
diff --git a/Source/core/html/HTMLTextFormControlElementTest.cpp b/Source/core/html/HTMLTextFormControlElementTest.cpp
index f6b07699985213fec399d666882101db4c3bc70a..25f75c3be0f29ca05a7a6b3ac0f145e5ca420a60 100644
--- a/Source/core/html/HTMLTextFormControlElementTest.cpp
+++ b/Source/core/html/HTMLTextFormControlElementTest.cpp
@@ -115,21 +115,21 @@ TEST_F(HTMLTextFormControlElementTest, SetSelectionRangeDoesNotCauseLayout)
     input().setSelectionRange(1, 1);
     FrameSelection& frameSelection = document().frame()->selection();
     forceLayoutFlag();
-    LayoutRect oldCaretRect = frameSelection.absoluteCaretBounds();
+    LayoutRect oldCaretRect(frameSelection.absoluteCaretBounds());
     EXPECT_FALSE(oldCaretRect.isEmpty());
     int startLayoutCount = layoutCount();
     input().setSelectionRange(1, 1);
     EXPECT_EQ(startLayoutCount, layoutCount());
-    LayoutRect newCaretRect = frameSelection.absoluteCaretBounds();
+    LayoutRect newCaretRect(frameSelection.absoluteCaretBounds());
     EXPECT_EQ(oldCaretRect, newCaretRect);
 
     forceLayoutFlag();
-    oldCaretRect = frameSelection.absoluteCaretBounds();
+    oldCaretRect = LayoutRect(frameSelection.absoluteCaretBounds());
     EXPECT_FALSE(oldCaretRect.isEmpty());
     startLayoutCount = layoutCount();
     input().setSelectionRange(2, 2);
     EXPECT_EQ(startLayoutCount, layoutCount());
-    newCaretRect = frameSelection.absoluteCaretBounds();
+    newCaretRect = LayoutRect(frameSelection.absoluteCaretBounds());
     EXPECT_NE(oldCaretRect, newCaretRect);
 }