Remove ForceReclaimResources

cc/trees/layer_tree_host_pixeltest_tiles.cc

 // Copyright 2015 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 "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/paint/display_item_list.h"
@@ skipping 139 matching lines @@
   LayerTreeHostTilesTestPartialInvalidation()
       : client_(gfx::Size(200, 200)),
         picture_layer_(PictureLayer::Create(&client_)) {
     picture_layer_->SetBounds(gfx::Size(200, 200));
     picture_layer_->SetIsDrawable(true);
   }
 
   void DidCommitAndDrawFrame() override {
     switch (layer_tree_host()->SourceFrameNumber()) {
       case 1:
-        // We have done one frame, so the layer's content has been rastered.
-        // Now we change the picture behind it to record something completely
-        // different, but we give a smaller invalidation rect. The layer should
-        // only re-raster the stuff in the rect. If it doesn't do partial raster
-        // it would re-raster the whole thing instead.
+        // We have done one frame, but the resource may not be available for
+        // partial raster yet. Force a second frame.
+        picture_layer_->SetNeedsDisplayRect(gfx::Rect(50, 50, 100, 100));
+        break;
+      case 2:
+        // We have done two frames, so the layer's content has been rastered
+        // twice and the first frame's resource is available for partial
+        // raster. Now we change the picture behind it to record something
+        // completely different, but we give a smaller invalidation rect. The
+        // layer should only re-raster the stuff in the rect. If it doesn't do
+        // partial raster it would re-raster the whole thing instead.
         client_.set_blue_top(false);
         Finish();
         picture_layer_->SetNeedsDisplayRect(gfx::Rect(50, 50, 100, 100));
 
         // Add a copy request to see what happened!
         DoReadback();
         break;
     }
   }
 
@@ skipping 82 matching lines @@
        FullRaster_SingleThread_GpuRaster) {
   RunRasterPixelTest(
       false, FULL_GPU, picture_layer_,
       base::FilePath(FILE_PATH_LITERAL("blue_yellow_flipped.png")));
 }
 
 }  // namespace
 }  // namespace cc
 
 #endif  // !defined(OS_ANDROID)