Paint: remove readPixels.

ash/common/wallpaper/wallpaper_controller_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/wallpaper/wallpaper_controller.h"
 
 #include <cmath>
 #include <cstdlib>
 
 #include "ash/common/ash_switches.h"
@@ skipping 147 matching lines @@
   // display resolution when the layout is WALLPAPER_LAYOUT_CENTER.
   void WallpaperFitToNativeResolution(WallpaperView* view,
                                       float device_scale_factor,
                                       int image_width,
                                       int image_height,
                                       SkColor color) {
     gfx::Size size = view->bounds().size();
     gfx::Canvas canvas(size, device_scale_factor, true);
     view->OnPaint(&canvas);
 
-    int canvas_width = canvas.sk_canvas()->imageInfo().width();
-    int canvas_height = canvas.sk_canvas()->imageInfo().height();
-    SkBitmap bitmap;
-    bitmap.allocN32Pixels(canvas_width, canvas_height);
-    canvas.sk_canvas()->readPixels(&bitmap, 0, 0);
-
-    for (int i = 0; i < canvas_width; i++) {
-      for (int j = 0; j < canvas_height; j++) {
-        if (i >= (canvas_width - image_width) / 2 &&
-            i < (canvas_width + image_width) / 2 &&
-            j >= (canvas_height - image_height) / 2 &&
-            j < (canvas_height + image_height) / 2) {
+    SkBitmap bitmap = canvas.GetBitmap();
+    int bitmap_width = bitmap.width();
+    int bitmap_height = bitmap.height();
+    for (int i = 0; i < bitmap_width; i++) {
+      for (int j = 0; j < bitmap_height; j++) {
+        if (i >= (bitmap_width - image_width) / 2 &&
+            i < (bitmap_width + image_width) / 2 &&
+            j >= (bitmap_height - image_height) / 2 &&
+            j < (bitmap_height + image_height) / 2) {
           EXPECT_EQ(color, bitmap.getColor(i, j));
         } else {
           EXPECT_EQ(SK_ColorBLACK, bitmap.getColor(i, j));
         }
       }
     }
   }
 
   // Runs AnimatingWallpaperWidgetController's animation to completion.
   // TODO(bshe): Don't require tests to run animations; it's slow.
@@ skipping 342 matching lines @@
   EXPECT_TRUE(ShouldCalculateColors());
 
   SetSessionState(SessionState::LOCKED);
   EXPECT_FALSE(ShouldCalculateColors());
 
   SetSessionState(SessionState::LOGIN_SECONDARY);
   EXPECT_FALSE(ShouldCalculateColors());
 }
 
 }  // namespace ash