Add enable-shadow-dom command line flag.

BUG=111112
TEST=Run chrome with '--enable-shadow-dom' and enter 'new WebKitShadowRoot(document.createElement('div'))' in Console.


Review URL: http://codereview.chromium.org/9285014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119652 0039d316-1c4b-4281-b951-d872f2087c98

6 files changed, 21 insertions, 0 deletions

diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index bd1b45b..5a821bd 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5078,6 +5078,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_MEDIA_STREAM_DESCRIPTION" desc="Description for the flag to enable MediaStream, GetUserMedia and PeerConnection.">
         Enable MediaStream, GetUserMedia, and PeerConnection APIs for WebRTC functionality. More info at webrtc.org.
       </message>
+      <message name="IDS_FLAGS_SHADOW_DOM_NAME" desc="Name for the flag to enable Shadow DOM.">
+        Enable Shadow DOM.
+      </message>
+      <message name="IDS_FLAGS_SHADOW_DOM_DESCRIPTION" desc="Description for the flag to enable Shadow DOM.">
+        This API allows web applications to use Web Components.
+      </message>
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">
         Crashes
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index fb78147..b4f2349 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -558,6 +558,13 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kDisableUberPage)
   },
+  {
+    "enable-shadow-dom",
+    IDS_FLAGS_SHADOW_DOM_NAME,
+    IDS_FLAGS_SHADOW_DOM_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableShadowDOM)
+  },
 };
 
 const Experiment* experiments = kExperiments;
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 80d1e68..52b3cfb 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -661,6 +661,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kEnableLogging,
     switches::kEnableMediaSource,
     switches::kEnableMediaStream,
+    switches::kEnableShadowDOM,
     switches::kEnableStrictSiteIsolation,
     switches::kDisableFullScreen,
     switches::kEnablePepperTesting,
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 391d4f8..6ddd375 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -253,6 +253,9 @@ const char kEnableSandboxLogging[]          = "enable-sandbox-logging";
 // Enable the seccomp sandbox (Linux only)
 const char kEnableSeccompSandbox[]          = "enable-seccomp-sandbox";
 
+// Enable shadow DOM API
+const char kEnableShadowDOM[]          = "enable-shadow-dom";
+
 // Enables StatsTable, logging statistics to a global named shared memory table.
 const char kEnableStatsTable[]              = "enable-stats-table";
 
diff --git a/content/public/common/content_switches.h b/content/public/common/content_switches.h
index a666779..ba48bfe 100644
--- a/content/public/common/content_switches.h
+++ b/content/public/common/content_switches.h
@@ -88,6 +88,7 @@ CONTENT_EXPORT extern const char kEnablePrivilegedWebGLExtensions[];
 extern const char kEnableSSLCachedInfo[];
 extern const char kEnableSandboxLogging[];
 extern const char kEnableSeccompSandbox[];
+extern const char kEnableShadowDOM[];
 CONTENT_EXPORT extern const char kEnableStatsTable[];
 extern const char kEnableStrictSiteIsolation[];
 CONTENT_EXPORT extern const char kEnableThreadedCompositing[];
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index c9f4099..0cb8d20 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -547,6 +547,9 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
 
   WebRuntimeFeatures::enableQuota(true);
 
+  WebRuntimeFeatures::enableShadowDOM(
+      command_line.HasSwitch(switches::kEnableShadowDOM));
+
   FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
 
   if (content::GetContentClient()->renderer()->