[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 ad0929e665e809670a9eca9cdd6c327c073eaa62..2fd73cc8fcfafa5e6d641946841f0890c0efee2a 100644
--- a/chrome/utility/chrome_content_utility_client.cc
+++ b/chrome/utility/chrome_content_utility_client.cc
@@ -262,9 +262,9 @@ 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();