Connect up --disable-gl-multisampling to command buffer

Plumb the --disable-gl-multisampling flag in to the command buffer, so it won't report the extension to any consumers.

BUG=75181
TEST=webgl antialias test

Review URL: http://codereview.chromium.org/6623063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@77899 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 23 insertions, 6 deletions

diff --git a/content/browser/gpu_process_host.cc b/content/browser/gpu_process_host.cc
index 900abff..bb1f4ad 100644
--- a/content/browser/gpu_process_host.cc
+++ b/content/browser/gpu_process_host.cc
@@ -102,10 +102,12 @@ class GpuMainThread : public base::Thread {
 };
 
 // static
-GpuProcessHost* GpuProcessHost::Create(int host_id) {
+GpuProcessHost* GpuProcessHost::Create(
+    int host_id,
+    const GpuFeatureFlags& gpu_feature_flags) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
-  GpuProcessHost* host = new GpuProcessHost(host_id);
+  GpuProcessHost* host = new GpuProcessHost(host_id, gpu_feature_flags);
   if (!host->Init()) {
     delete host;
     return NULL;
@@ -124,9 +126,12 @@ GpuProcessHost* GpuProcessHost::FromID(int host_id) {
   return g_hosts_by_id.Lookup(host_id);
 }
 
-GpuProcessHost::GpuProcessHost(int host_id)
+GpuProcessHost::GpuProcessHost(
+    int host_id,
+    const GpuFeatureFlags& gpu_feature_flags)
     : BrowserChildProcessHost(GPU_PROCESS, NULL),
-      host_id_(host_id) {
+      host_id_(host_id),
+      gpu_feature_flags_(gpu_feature_flags) {
   g_hosts_by_id.AddWithID(this, host_id_);
 }
 
@@ -296,10 +301,15 @@ bool GpuProcessHost::LaunchGpuProcess() {
     switches::kLoggingLevel,
     switches::kNoGpuSandbox,
     switches::kNoSandbox,
+    switches::kDisableGLMultisampling,
   };
   cmd_line->CopySwitchesFrom(browser_command_line, kSwitchNames,
                              arraysize(kSwitchNames));
 
+  if (gpu_feature_flags_.flags() & GpuFeatureFlags::kGpuFeatureMultisampling) {
+    cmd_line->AppendSwitch(switches::kDisableGLMultisampling);
+  }
+
   // If specified, prepend a launcher program to the command line.
   if (!gpu_launcher.empty())
     cmd_line->PrependWrapper(gpu_launcher);
diff --git a/content/browser/gpu_process_host.h b/content/browser/gpu_process_host.h
index 69f5916..35c9163 100644
--- a/content/browser/gpu_process_host.h
+++ b/content/browser/gpu_process_host.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "base/threading/non_thread_safe.h"
+#include "chrome/common/gpu_feature_flags.h"
 #include "content/browser/browser_child_process_host.h"
 
 namespace IPC {
@@ -19,7 +20,9 @@ class GpuProcessHost : public BrowserChildProcessHost,
 
   // Create a GpuProcessHost with the given ID. The object can be found using
   // FromID with the same id.
-  static GpuProcessHost* Create(int host_id);
+  static GpuProcessHost* Create(
+      int host_id,
+      const GpuFeatureFlags& gpu_feature_flags);
 
   // Get the GPU process host for the GPU process with the given ID. Returns
   // null if the process no longer exists.
@@ -31,7 +34,9 @@ class GpuProcessHost : public BrowserChildProcessHost,
   virtual bool OnMessageReceived(const IPC::Message& message);
 
  private:
-  explicit GpuProcessHost(int host_id);
+  explicit GpuProcessHost(
+      int host_id,
+      const GpuFeatureFlags& gpu_feature_flags);
   virtual ~GpuProcessHost();
   bool Init();
 
@@ -49,6 +54,8 @@ class GpuProcessHost : public BrowserChildProcessHost,
   // The serial number of the GpuProcessHost / GpuProcessHostUIShim pair.
   int host_id_;
 
+  GpuFeatureFlags gpu_feature_flags_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };