Don't expose --disable-gpu-compositing, only set internally.

The flag isn't meant to be set externally, it doesn't work on most
configs. It's only meant internally to make sure the renderer doesn't
try to use GPU when the browser is in software.

BUG=None

Review URL: https://codereview.chromium.org/300523002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272636 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/login/chrome_restart_request.cc

@@ -79,7 +79,6 @@ std::string DeriveCommandLine(const GURL& start_url,
     ::switches::kDisableFiltersOverIPC,
     ::switches::kDisableGpuShaderDiskCache,
     ::switches::kDisableGpuWatchdog,
-    ::switches::kDisableGpuCompositing,
     ::switches::kDisableGpuRasterization,
     ::switches::kDisableImplSidePainting,
     ::switches::kDisableLowResTiling,

content/browser/renderer_host/render_process_host_impl.cc

@@ -1038,7 +1038,6 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kDisableFastTextAutosizing,
     switches::kDisableFileSystem,
     switches::kDisableFiltersOverIPC,
-    switches::kDisableGpuCompositing,
     switches::kDisableGpuVsync,
     switches::kDisableLowResTiling,
     switches::kDisableHistogramCustomizer,

content/public/common/content_switches.h

@@ -59,7 +59,7 @@ CONTENT_EXPORT extern const char kDisableFlashStage3d[];
 CONTENT_EXPORT extern const char kDisableGestureTapHighlight[];
 CONTENT_EXPORT extern const char kDisableGLMultisampling[];
 CONTENT_EXPORT extern const char kDisableGpu[];
-CONTENT_EXPORT extern const char kDisableGpuCompositing[];
+extern const char kDisableGpuCompositing[];
 extern const char kDisableGpuProcessCrashLimit[];
 CONTENT_EXPORT extern const char kDisableGpuRasterization[];
 CONTENT_EXPORT extern const char kDisableGpuSandbox[];