[Courgette] Refactor BSDiff namespaces and bsdiff::search() interface.

chrome/utility/chrome_content_utility_client.cc

Index: chrome/utility/chrome_content_utility_client.cc
diff --git a/chrome/utility/chrome_content_utility_client.cc b/chrome/utility/chrome_content_utility_client.cc
index 78038e406a614901ef5e90981d1450f1ada1d0e1..4a8f89494a9ceb3ea563e97a63f1e011d44717ad 100644
--- a/chrome/utility/chrome_content_utility_client.cc
+++ b/chrome/utility/chrome_content_utility_client.cc
@@ -266,9 +266,9 @@ void ChromeContentUtilityClient::OnPatchFileBsdiff(
   if (input_file.empty() || patch_file.empty() || output_file.empty()) {
     Send(new ChromeUtilityHostMsg_PatchFile_Finished(-1));
   } else {
-    const int patch_status = courgette::ApplyBinaryPatch(input_file,
-                                                         patch_file,
-                                                         output_file);
+    const int patch_status = bsdiff::ApplyBinaryPatch(input_file,
+                                                      patch_file,
+                                                      output_file);
     Send(new ChromeUtilityHostMsg_PatchFile_Finished(patch_status));
   }
   ReleaseProcessIfNeeded();