Deprecate two more functions using SK_ATTR_DEPRECATED macro.

BUG=None
TEST=None
R=reed@google.com, scroggo@google.com

Review URL: https://codereview.chromium.org/136973007

git-svn-id: http://skia.googlecode.com/svn/trunk@13079 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkDevice.h

@@ -211,9 +211,7 @@ protected:
      */
     virtual void clear(SkColor color) = 0;
 
-    /**
-     * Deprecated name for clear.
-     */
+    SK_ATTR_DEPRECATED("use clear() instead")
     void eraseColor(SkColor eraseColor) { this->clear(eraseColor); }
 
     /** These are called inside the per-device-layer loop for each draw call.

include/core/SkImageDecoder.h

@@ -288,10 +288,7 @@ public:
      */
     bool decodeSubset(SkBitmap* bm, const SkIRect& subset, SkBitmap::Config pref);
 
-    /**
-     *  @Deprecated
-     *  Use decodeSubset instead.
-     */
+    SK_ATTR_DEPRECATED("use decodeSubset() instead")
     bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect, SkBitmap::Config pref) {
         return this->decodeSubset(bitmap, rect, pref);
     }