Revert of Implement canComputeFastBounds() for image filters.

include/core/SkImageFilter.h

Index: include/core/SkImageFilter.h
diff --git a/include/core/SkImageFilter.h b/include/core/SkImageFilter.h
index 5870f7f2d66c95fef304c06da68a4a7e6bbca969..dce6b133b46b79d32bfcbf7dad13223fb61af148 100644
--- a/include/core/SkImageFilter.h
+++ b/include/core/SkImageFilter.h
@@ -178,7 +178,6 @@
     bool asAColorFilter(SkColorFilter** filterPtr) const {
         return this->countInputs() > 0 &&
                NULL == this->getInput(0) &&
-               !this->affectsTransparentBlack() &&
                this->isColorFilterNode(filterPtr);
     }
 
@@ -214,9 +213,6 @@
 
     // Default impl returns union of all input bounds.
     virtual void computeFastBounds(const SkRect&, SkRect*) const;
-
-    // Can this filter DAG compute the resulting bounds of an object-space rectangle?
-    bool canComputeFastBounds() const;
 
     /**
      * Create an SkMatrixImageFilter, which transforms its input by the given matrix.
@@ -366,14 +362,6 @@
     virtual bool asFragmentProcessor(GrFragmentProcessor**, GrProcessorDataManager*, GrTexture*,
                                      const SkMatrix&, const SkIRect& bounds) const;
 
-    /**
-     * Returns true if this filter can cause transparent black pixels to become
-     * visible (ie., alpha > 0). The default implementation returns false. This
-     * function is non-recursive, i.e., only queries this filter and not its
-     * inputs.
-     */
-    virtual bool affectsTransparentBlack() const;
-
 private:
     friend class SkGraphics;
     static void PurgeCache();