Revert of Converted video frame and image callbacks to use new sync tokens.

content/common/gpu/client/gl_helper.cc

Index: content/common/gpu/client/gl_helper.cc
diff --git a/content/common/gpu/client/gl_helper.cc b/content/common/gpu/client/gl_helper.cc
index 33c9521c8f7ed37e7da4a463e36a80d2c7de6350..88c649946235e6bd295a4ea0dfb3422f9991e0ea 100644
--- a/content/common/gpu/client/gl_helper.cc
+++ b/content/common/gpu/client/gl_helper.cc
@@ -953,12 +953,6 @@
 }
 
 uint32 GLHelper::InsertSyncPoint() { return gl_->InsertSyncPointCHROMIUM(); }
-
-void GLHelper::GenerateSyncToken(gpu::SyncToken* sync_token) {
-  const uint64_t fence_sync = gl_->InsertFenceSyncCHROMIUM();
-  gl_->ShallowFlushCHROMIUM();
-  gl_->GenSyncTokenCHROMIUM(fence_sync, sync_token->GetData());
-}
 
 void GLHelper::WaitSyncToken(const gpu::SyncToken& sync_token) {
   gl_->WaitSyncTokenCHROMIUM(sync_token.GetConstData());