IPC to generate mailbox names on the GPU process IO thread.

This allows the browser and renderer processes to get new unique mailbox names without syncing with the GPU process main thread.

Review URL: https://chromiumcodereview.appspot.com/11362053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166351 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 8 insertions, 3 deletions

diff --git a/gpu/command_buffer/service/mailbox_manager.cc b/gpu/command_buffer/service/mailbox_manager.cc
index 9cdf0bc..ec7ad94 100644
--- a/gpu/command_buffer/service/mailbox_manager.cc
+++ b/gpu/command_buffer/service/mailbox_manager.cc
@@ -15,9 +15,9 @@ namespace gles2 {
 MailboxManager::MailboxManager()
     : hmac_(crypto::HMAC::SHA256),
       textures_(std::ptr_fun(&MailboxManager::TargetNameLess)) {
-  unsigned char private_key[GL_MAILBOX_SIZE_CHROMIUM / 2];
-  base::RandBytes(private_key, sizeof(private_key));
-  bool success = hmac_.Init(private_key, sizeof(private_key));
+  base::RandBytes(private_key_, sizeof(private_key_));
+  bool success = hmac_.Init(
+      base::StringPiece(private_key_, sizeof(private_key_)));
   DCHECK(success);
 }
 
diff --git a/gpu/command_buffer/service/mailbox_manager.h b/gpu/command_buffer/service/mailbox_manager.h
index f9ae588..337998d 100644
--- a/gpu/command_buffer/service/mailbox_manager.h
+++ b/gpu/command_buffer/service/mailbox_manager.h
@@ -56,6 +56,10 @@ class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> {
   // manager.
   void DestroyOwnedTextures(TextureManager* owner, bool have_context);
 
+  std::string private_key() {
+    return std::string(private_key_, sizeof(private_key_));
+  }
+
  private:
   friend class base::RefCounted<MailboxManager>;
 
@@ -86,6 +90,7 @@ class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> {
       std::pointer_to_binary_function<
           const TargetName&, const TargetName&, bool> > TextureDefinitionMap;
 
+  char private_key_[GL_MAILBOX_SIZE_CHROMIUM / 2];
   crypto::HMAC hmac_;
   TextureDefinitionMap textures_;