Add --deterministic-mode which adds a number of flags needed for determinism

Change-Id: I827cb57345850d703431dc80c1236968737f6a43
Reviewed-on: https://chromium-review.googlesource.com/948542Reviewed-by: Eric Seckler <eseckler@chromium.org>
Reviewed-by: vmpstr <vmpstr@chromium.org>
Commit-Queue: Alex Clarke <alexclarke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541934}

headless/app/DEPS

+include_rules = {
+  "+cc/base/switches.h",
+  "+components/viz/common/switches.h",
+}
+

headless/app/headless_shell.cc

@@ -25,6 +25,8 @@
 #include "base/task_runner_util.h"
 #include "base/task_scheduler/post_task.h"
 #include "build/build_config.h"
+#include "cc/base/switches.h"
+#include "components/viz/common/switches.h"
 #include "content/public/app/content_main.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/content_switches.h"
@@ -704,6 +706,21 @@ int HeadlessShellMain(int argc, const char** argv) {
   builder.SetCrashDumpsDir(dumps_path);
 #endif
 
+  if (command_line.HasSwitch(switches::kDeterministicMode)) {
+    command_line.AppendSwitch(switches::kEnableBeginFrameControl);
+    command_line.AppendSwitch(switches::kDeterministicFetch);
+
+    // Compositor flags
+    command_line.AppendSwitch(::switches::kRunAllCompositorStagesBeforeDraw);
+    command_line.AppendSwitch(::switches::kDisableNewContentRenderingTimeout);
+    command_line.AppendSwitch(::switches::kEnableSurfaceSynchronization);
+
+    // Renderer flags
+    command_line.AppendSwitch(cc::switches::kDisableThreadedAnimation);
+    command_line.AppendSwitch(::switches::kDisableThreadedScrolling);
+    command_line.AppendSwitch(cc::switches::kDisableCheckerImaging);
+  }
+
   if (command_line.HasSwitch(switches::kEnableBeginFrameControl))
     builder.SetEnableBeginFrameControl(true);
 

headless/app/headless_shell_switches.cc

@@ -26,6 +26,11 @@ const char kDisableCrashReporter[] = "disable-crash-reporter";
 // The directory breakpad should store minidumps in.
 const char kCrashDumpsDir[] = "crash-dumps-dir";
 
+// A meta flag. This sets a number of flags which put the browser into
+// deterministic mode where begin frames should be issued over DevToolsProtocol
+// (experimental).
+const char kDeterministicMode[] = "deterministic-mode";
+
 // Instructs headless_shell to cause network fetches to complete in order of
 // creation. This removes a significant source of network related
 // non-determinism at the cost of slower page loads.

headless/app/headless_shell_switches.h

@@ -12,6 +12,7 @@ namespace switches {
 
 extern const char kCrashDumpsDir[];
 extern const char kDefaultBackgroundColor[];
+extern const char kDeterministicMode[];
 extern const char kDeterministicFetch[];
 extern const char kDisableCrashReporter[];
 extern const char kDumpDom[];