move SkImage::ColorType into SkColorType

objective -- move clients over to SkImage

tasks
- use SkImageInfo instead of SkBitmap::Config
- add support for colortables to SkImage
- add drawImage to SkCanvas
- return SkImage from readPixels

This CL works towards the first task

R=robertphillips@google.com

Review URL: https://codereview.chromium.org/54363008

git-svn-id: http://skia.googlecode.com/svn/trunk@12077 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/LazyDecodeBitmap.cpp b/tools/LazyDecodeBitmap.cpp
index 2367154..c0b7eea 100644
--- a/tools/LazyDecodeBitmap.cpp
+++ b/tools/LazyDecodeBitmap.cpp
@@ -40,7 +40,7 @@
         SkSafeUnref(fPurgeableImageCache);
     }
 
-    virtual SkImageCache* selectCache(const SkImage::Info& info) SK_OVERRIDE {
+    virtual SkImageCache* selectCache(const SkImageInfo& info) SK_OVERRIDE {
         if (info.fWidth * info.fHeight > 32 * 1024 && fPurgeableImageCache != NULL) {
             return fPurgeableImageCache;
         }