Revert of cc: Remove the --enable-partial-swap flag.

chrome/browser/chromeos/login/chrome_restart_request.cc

Index: chrome/browser/chromeos/login/chrome_restart_request.cc
diff --git a/chrome/browser/chromeos/login/chrome_restart_request.cc b/chrome/browser/chromeos/login/chrome_restart_request.cc
index 33990fec8a4505c4f3435be470118899bd9656f3..486125e34209f654aad8bcaf2204609f4e3382fd 100644
--- a/chrome/browser/chromeos/login/chrome_restart_request.cc
+++ b/chrome/browser/chromeos/login/chrome_restart_request.cc
@@ -179,6 +179,7 @@
       cc::switches::kEnableGPURasterization,
       cc::switches::kEnableImplSidePainting,
       cc::switches::kEnableMapImage,
+      cc::switches::kEnablePartialSwap,
       cc::switches::kEnablePerTilePainting,
       cc::switches::kEnablePinchVirtualViewport,
       cc::switches::kEnableTopControlsPositionCalculation,
@@ -238,6 +239,15 @@
             ::switches::kRegisterPepperPlugins).c_str());
   }
 
+  // TODO(zelidrag): Remove this hack that get us around compositing bug from
+  // http://crbug.com/179256 once that bug is resolved.
+  if (command_line->HasSwitch(::switches::kForceAppMode)) {
+    std::string switch_to_remove("--");
+    switch_to_remove.append(cc::switches::kEnablePartialSwap);
+    cmd_line_str = cmd_line_str.replace(cmd_line_str.find(switch_to_remove),
+                                        switch_to_remove.length(), "");
+  }
+
   return cmd_line_str;
 }