Add default constructor and operator==/!= for CullRect

third_party/WebKit/Source/platform/graphics/paint/CullRect.h

Index: third_party/WebKit/Source/platform/graphics/paint/CullRect.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/CullRect.h b/third_party/WebKit/Source/platform/graphics/paint/CullRect.h
index 20ca2ad43f16c4fdd0d91fa15d48ee2d3ce17d92..b96bff08d322046744ae62d5a491d555b6fa206c 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/CullRect.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/CullRect.h
@@ -10,7 +10,6 @@
 #include "wtf/Allocator.h"
 #include "wtf/HashMap.h"
 #include "wtf/ListHashSet.h"
-#include "wtf/text/WTFString.h"
 
 #include <limits>
 
@@ -24,6 +23,7 @@ class PLATFORM_EXPORT CullRect {
   DISALLOW_NEW();
 
  public:
+  CullRect() {}
   explicit CullRect(const IntRect& rect) : m_rect(rect) {}
   CullRect(const CullRect&, const IntPoint& offset);
   CullRect(const CullRect&, const IntSize& offset);
@@ -36,11 +36,11 @@ class PLATFORM_EXPORT CullRect {
   bool intersectsHorizontalRange(LayoutUnit lo, LayoutUnit hi) const;
   bool intersectsVerticalRange(LayoutUnit lo, LayoutUnit hi) const;
 
-  String toString() const { return m_rect.toString(); }

[chrishtr, 2016/11/11 19:02:16]

Why remove this?

[Xianzhu, 2016/11/11 19:13:25]

Sorry, this is a mistake when cherry-picking this file from the big change
without rebasing that branch to ToT. Reverted.

-
  private:
   IntRect m_rect;
 
+  friend bool operator==(const CullRect&, const CullRect&);
+
   // TODO(chrishtr): temporary while we implement CullRect everywhere.
   friend class FramePainter;
   friend class GridPainter;
@@ -53,6 +53,13 @@ class PLATFORM_EXPORT CullRect {
   friend class WebPluginContainerImpl;
 };
 
+inline bool operator==(const CullRect& a, const CullRect& b) {
+  return a.m_rect == b.m_rect;
+}
+inline bool operator!=(const CullRect& a, const CullRect& b) {
+  return !(a == b);
+}
+
 }  // namespace blink
 
 #endif  // CullRect_h