content: Remove switches::kSkipGpuDataLoading from content_shell

switches::kSkipGpuDataLoading causes the content_shell to not load
the blacklist and driver bug list.  This is preventing another cl
from landing that enables GPU rasterization.

Note for sherrifs, this flag was introduced to fix flake with
GpuTabTest, if we see this test flaking out, it may be as a
result to this change.

BUG=445500

Review URL: https://codereview.chromium.org/827293002

Cr-Commit-Position: refs/heads/master@{#310132}

content/shell/app/shell_main_delegate.cc

@@ -149,7 +149,6 @@ bool ShellMainDelegate::BasicStartupComplete(int* exit_code) {
     command_line.AppendSwitch(switches::kAllowFileAccessFromFiles);
     command_line.AppendSwitchASCII(switches::kUseGL,
                                    gfx::kGLImplementationOSMesaName);
-    command_line.AppendSwitch(switches::kSkipGpuDataLoading);
     command_line.AppendSwitchASCII(switches::kTouchEvents,
                                    switches::kTouchEventsEnabled);
     command_line.AppendSwitchASCII(switches::kForceDeviceScaleFactor, "1.0");