Handle geometry effects of filters in GeometryMapper

third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h

Index: third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h b/third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h
index f364a24dfab44702c222ad9b5de0b246d264120a..2928a45355080dd759e8211d4dd1a1709f28b7e6 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h
+++ b/third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h
@@ -7,6 +7,7 @@
 
 #include "cc/output/filter_operations.h"
 #include "platform/PlatformExport.h"
+#include "platform/geometry/FloatRect.h"
 #include "platform/geometry/IntPoint.h"
 #include "platform/graphics/Color.h"
 #include "third_party/skia/include/core/SkScalar.h"
@@ -41,6 +42,9 @@ class PLATFORM_EXPORT CompositorFilterOperations {
   void clear();
   bool isEmpty() const;
 
+  FloatRect mapRect(const FloatRect&) const;

[chrishtr, 2017/02/01 02:59:12]

Document what this maps from and to.

[Xianzhu, 2017/02/03 01:38:16]

Done.

+  bool hasFilterThatMovesPixels() const;
+
   // For reference filters, this equality operator compares pointers of the
   // image_filter fields instead of their values.
   bool operator==(const CompositorFilterOperations&) const;