[cc] Route LayerImpl::layerTreeHostImpl() calls through LayerTreeImpl

cc/layer_tree_settings.cc

+// Copyright 2011 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 "cc/layer_tree_settings.h"
+
+#include <limits>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/string_number_conversions.h"
+#include "cc/switches.h"
+
+namespace cc {
+
+LayerTreeSettings::LayerTreeSettings()
+    : acceleratePainting(false)
+    , implSidePainting(false)
+    , renderVSyncEnabled(true)
+    , perTilePaintingEnabled(false)
+    , partialSwapEnabled(false)
+    , acceleratedAnimationEnabled(true)
+    , pageScalePinchZoomEnabled(false)
+    , backgroundColorInsteadOfCheckerboard(false)
+    , showOverdrawInTracing(false)
+    , refreshRate(0)
+    , maxPartialTextureUpdates(std::numeric_limits<size_t>::max())
+    , numRasterThreads(1)
+    , defaultTileSize(gfx::Size(256, 256))
+    , maxUntiledLayerSize(gfx::Size(512, 512))
+    , minimumOcclusionTrackingSize(gfx::Size(160, 160))
+{
+    // TODO(danakj): Move this to chromium when we don't go through the WebKit API anymore.
+    implSidePainting = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kEnableImplSidePainting);
+    partialSwapEnabled = CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnablePartialSwap);
+    backgroundColorInsteadOfCheckerboard = CommandLine::ForCurrentProcess()->HasSwitch(switches::kBackgroundColorInsteadOfCheckerboard);
+    showOverdrawInTracing = CommandLine::ForCurrentProcess()->HasSwitch(switches::kTraceOverdraw);
+
+    initialDebugState.showPropertyChangedRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowPropertyChangedRects);
+    initialDebugState.showSurfaceDamageRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowSurfaceDamageRects);
+    initialDebugState.showScreenSpaceRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowScreenSpaceRects);
+    initialDebugState.showReplicaScreenSpaceRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
+    initialDebugState.showOccludingRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowOccludingRects);
+    initialDebugState.showNonOccludingRects = CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kShowNonOccludingRects);
+
+    if (CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kNumRasterThreads)) {
+        const size_t kMaxRasterThreads = 64;
+        std::string num_raster_threads =
+            CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+                switches::kNumRasterThreads);
+        int num_threads;
+        if (base::StringToInt(num_raster_threads, &num_threads) &&
+            num_threads > 0 && num_threads <= kMaxRasterThreads) {
+            numRasterThreads = num_threads;
+        } else {
+            LOG(WARNING) << "Bad number of raster threads: " <<
+                num_raster_threads;
+        }
+    }
+}
+
+LayerTreeSettings::~LayerTreeSettings()
+{
+}
+
+}  // namespace cc