Replace uses of legacy SkImageGenerator API

cc/tiles/tile_manager_unittest.cc

 // Copyright 2013 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 <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 2303 matching lines @@
 
 class CheckerImagingTileManagerTest : public TestLayerTreeHostBase {
  public:
   class MockImageGenerator : public SkImageGenerator {
    public:
     explicit MockImageGenerator(const gfx::Size& size)
         : SkImageGenerator(
               SkImageInfo::MakeN32Premul(size.width(), size.height())) {}
 
    protected:
-    MOCK_METHOD5(onGetPixels,
-                 bool(const SkImageInfo&, void*, size_t, SkPMColor[], int*));
+    MOCK_METHOD4(onGetPixels,
+                 bool(const SkImageInfo&, void*, size_t, const Options&));
   };
 
   void TearDown() override {
     // Allow all tasks on the image worker to run now. Any scheduled decodes
     // will be aborted.
     task_runner_->set_run_tasks_synchronously(true);
   }
 
   LayerTreeSettings CreateSettings() override {
     LayerTreeSettings settings;
@@ skipping 312 matching lines @@
         EXPECT_TRUE(tile);
       else
         EXPECT_FALSE(tile);
     }
   }
   host_impl()->client()->reset_did_request_impl_side_invalidation();
 }
 
 }  // namespace
 }  // namespace cc