Fix SkTileImageFilter when srcRect is a superset of bitmap bounds.

include/core/SkImageFilter.h

Index: include/core/SkImageFilter.h
diff --git a/include/core/SkImageFilter.h b/include/core/SkImageFilter.h
index e197664294bcd05a1e5bfa7a9ae01f63a4ac4d08..18e17febe6d5264a25239d930e05f7c6607aab60 100644
--- a/include/core/SkImageFilter.h
+++ b/include/core/SkImageFilter.h
@@ -107,11 +107,17 @@ public:
         uint32_t fFlags;
     };
 
+    enum TileUsage {
+        kPossible_TileUsage,    //!< the created device may be drawn tiled
+        kNever_TileUsage,       //!< the created device will never be drawn tiled
+    };
+
     class Proxy {
     public:
         virtual ~Proxy() {}
 
-        virtual SkBaseDevice* createDevice(int width, int height) = 0;
+        virtual SkBaseDevice* createDevice(int width, int height,
+                                           TileUsage usage = kNever_TileUsage) = 0;
 
         // Returns true if the proxy handled the filter itself. If this returns
         // false then the filter's code will be called.
@@ -124,7 +130,8 @@ public:
     public:
         DeviceProxy(SkBaseDevice* device) : fDevice(device) {}
 
-        SkBaseDevice* createDevice(int width, int height) override;
+        SkBaseDevice* createDevice(int width, int height,
+                                   TileUsage usage = kNever_TileUsage) override;
 
         // Returns true if the proxy handled the filter itself. If this returns
         // false then the filter's code will be called.