add new copyTo version to SkBitmap, which takes SkColorType

BUG=skia:
R=scroggo@google.com, halcanary@google.com, bsalomon@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/171723007

git-svn-id: http://skia.googlecode.com/svn/trunk@13553 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/CopyTilesRenderer.cpp b/tools/CopyTilesRenderer.cpp
index d3f266b..1298d43 100644
--- a/tools/CopyTilesRenderer.cpp
+++ b/tools/CopyTilesRenderer.cpp
@@ -70,7 +70,7 @@
                                 dst.pixelRef()->readPixels(&copy, &subset);
                             } else {
 #endif
-                                dst.copyTo(&copy, dst.config());
+                                dst.copyTo(&copy);
 #if SK_SUPPORT_GPU
                             }
 #endif
diff --git a/tools/skdiff_utils.cpp b/tools/skdiff_utils.cpp
index 6f73a08..2f05239 100644
--- a/tools/skdiff_utils.cpp
+++ b/tools/skdiff_utils.cpp
@@ -85,7 +85,7 @@
 
 bool write_bitmap(const SkString& path, const SkBitmap& bitmap) {
     SkBitmap copy;
-    bitmap.copyTo(&copy, SkBitmap::kARGB_8888_Config);
+    bitmap.copyTo(&copy, kPMColor_SkColorType);
     force_all_opaque(copy);
     return SkImageEncoder::EncodeFile(path.c_str(), copy,
                                       SkImageEncoder::kPNG_Type, 100);
diff --git a/tools/skimage_main.cpp b/tools/skimage_main.cpp
index f5a2b3d..d34d57c 100644
--- a/tools/skimage_main.cpp
+++ b/tools/skimage_main.cpp
@@ -164,7 +164,7 @@
         return true;
     }
 
-    if (bm.config() == SkBitmap::kARGB_8888_Config) {
+    if (bm.colorType() == kPMColor_SkColorType) {
         // First attempt at encoding failed, and the bitmap was already 8888. Making
         // a copy is not going to help.
         return false;
@@ -172,7 +172,7 @@
 
     // Encoding failed. Copy to 8888 and try again.
     SkBitmap bm8888;
-    if (!bm.copyTo(&bm8888, SkBitmap::kARGB_8888_Config)) {
+    if (!bm.copyTo(&bm8888, kPMColor_SkColorType)) {
         return false;
     }
     return SkImageEncoder::EncodeFile(filename.c_str(), bm8888, SkImageEncoder::kPNG_Type, 100);
diff --git a/tools/skpdiff/SkDiffContext.cpp b/tools/skpdiff/SkDiffContext.cpp
index df1c93d..b9c55c1 100644
--- a/tools/skpdiff/SkDiffContext.cpp
+++ b/tools/skpdiff/SkDiffContext.cpp
@@ -122,7 +122,7 @@
 
             // compute the image diff and output it
             SkBitmap copy;
-            diffData.fResult.poiAlphaMask.copyTo(&copy, SkBitmap::kARGB_8888_Config);
+            diffData.fResult.poiAlphaMask.copyTo(&copy, kPMColor_SkColorType);
             SkImageEncoder::EncodeFile(newRecord->fDifferencePath.c_str(), copy,
                                        SkImageEncoder::kPNG_Type, 100);
 
diff --git a/tools/skpdiff/SkPMetric.cpp b/tools/skpdiff/SkPMetric.cpp
index 22337d8..ed80763 100644
--- a/tools/skpdiff/SkPMetric.cpp
+++ b/tools/skpdiff/SkPMetric.cpp
@@ -125,8 +125,8 @@
 /// Converts a 8888 bitmap to LAB color space and puts it into the output
 static bool bitmap_to_cielab(const SkBitmap* bitmap, ImageLAB* outImageLAB) {
     SkBitmap bm8888;
-    if (bitmap->config() != SkBitmap::kARGB_8888_Config) {
-        if (!bitmap->copyTo(&bm8888, SkBitmap::kARGB_8888_Config)) {
+    if (bitmap->colorType() != kPMColor_SkColorType) {
+        if (!bitmap->copyTo(&bm8888, kPMColor_SkColorType)) {
             return false;
         }
         bitmap = &bm8888;