Moving 4 SkImageFilter derived classes from blink to skia

There were 4 classes in blink that derived from SkImageFilter :
- TileImageFilter -> SkTileImageFilter
- OffsetImageFilter -> SkOffsetImageFilter (already existed)
- FloodImageFilter -> SkFloodImageFilter
- CompositeImageFilter -> SkCompositeImageFilter

All functions were copied as is, without modification (except for warnings fixes), except for the offset filter, which was merged into the existing SkOffsetImageFilter class, as a special case when a crop rect is provided. Since the names won't clash with the names in blink, it should be easy to integrate them in blink later and fix issues, if needed.

BUG=
R=senorblanco@google.com, senorblanco@chromium.org, bsalomon@google.com, reed@google.com, mtklein@google.com

Author: sugoi@chromium.org

Review URL: https://chromiumcodereview.appspot.com/24157005

git-svn-id: http://skia.googlecode.com/svn/trunk@11475 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/effects/SkOffsetImageFilter.h b/include/effects/SkOffsetImageFilter.h
index 62b5fa6..0b8c900 100644
--- a/include/effects/SkOffsetImageFilter.h
+++ b/include/effects/SkOffsetImageFilter.h
@@ -12,8 +12,11 @@
 #include "SkPoint.h"
 
 class SK_API SkOffsetImageFilter : public SkImageFilter {
+    typedef SkImageFilter INHERITED;
+
 public:
-    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL);
+    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
+                        const SkIRect* cropRect = NULL);
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
 
 protected:
@@ -26,8 +29,6 @@
 
 private:
     SkVector fOffset;
-
-    typedef SkImageFilter INHERITED;
 };
 
 #endif