Add option for SKP capture without reencoding images

content/public/common/content_switches.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 "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 763 matching lines @@
 // http://www.chromium.org/developers/design-documents/site-isolation
 const char kSitePerProcess[]                = "site-per-process";
 
 // Skip gpu info collection, blacklist loading, and blacklist auto-update
 // scheduling at browser startup time.
 // Therefore, all GPU features are available, and about:gpu page shows empty
 // content. The switch is intended only for layout tests.
 // TODO(gab): Get rid of this switch entirely.
 const char kSkipGpuDataLoading[]            = "skip-gpu-data-loading";
 
+// Skips reencoding bitmaps as PNGs when the encoded data is unavailable
+// during SKP capture.  This allows for obtaining an accurate sample of
+// the types of images on the web, rather than being weighted towards PNGs
+// that we have encoded ourselves.
+const char kSkipReencodingOnSKPCapture[]    = "skip-reencoding-on-skp-capture";
+
 // Specifies if the browser should start in fullscreen mode, like if the user
 // had pressed F11 right after startup.
 const char kStartFullscreen[] = "start-fullscreen";
 
 // Specifies if the |StatsCollectionController| needs to be bound in the
 // renderer. This binding happens on per-frame basis and hence can potentially
 // be a performance bottleneck. One should only enable it when running a test
 // that needs to access the provided statistics.
 const char kStatsCollectionController[] =
     "enable-stats-collection-bindings";
@@ skipping 240 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches