Clear logging in Widevine CDM and default component installer

chrome/browser/component_updater/widevine_cdm_component_installer.cc

Index: chrome/browser/component_updater/widevine_cdm_component_installer.cc
diff --git a/chrome/browser/component_updater/widevine_cdm_component_installer.cc b/chrome/browser/component_updater/widevine_cdm_component_installer.cc
index 1976555a4d65cf6c1e85aca6850900ef9caab327..6952870bfa5dd078c6f80c71c5c12d48f7fea3e2 100644
--- a/chrome/browser/component_updater/widevine_cdm_component_installer.cc
+++ b/chrome/browser/component_updater/widevine_cdm_component_installer.cc
@@ -119,6 +119,7 @@ bool MakeWidevineCdmPluginInfo(const base::Version& version,
   if (!version.IsValid() ||
       version.components().size() !=
           static_cast<size_t>(kWidevineCdmVersionNumComponents)) {
+    DLOG(WARNING) << "Invalid version.";
     return false;
   }
 
@@ -206,8 +207,6 @@ void RegisterWidevineCdmWithChrome(
     const base::Version& cdm_version,
     const base::FilePath& cdm_install_dir,
     std::unique_ptr<base::DictionaryValue> manifest) {
-  LOG(WARNING) << __FUNCTION__;
-
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   const std::string codecs = GetCodecs(*manifest);
 
@@ -217,6 +216,8 @@ void RegisterWidevineCdmWithChrome(
     return;
   }
 
+  VLOG(1) << "Register Widevine CDM with Chrome";
+
   // true = Add to beginning of list to override any existing registrations.
   PluginService::GetInstance()->RegisterInternalPlugin(
       plugin_info.ToWebPluginInfo(), true);
@@ -319,9 +320,6 @@ bool WidevineCdmComponentInstallerTraits::VerifyInstallation(
 // <profile>\AppData\Local\Google\Chrome\User Data\WidevineCdm\.
 base::FilePath WidevineCdmComponentInstallerTraits::GetRelativeInstallDir()
     const {
-  // Add LOG(WARNING) here and below to help investigate http://crbug.com/614745
-  // TODO(xhwang): Remove LOG(WARNING)s in this file after investigation.
-  LOG(WARNING) << __FUNCTION__;
   return base::FilePath(FILE_PATH_LITERAL("WidevineCdm"));
 }
 
@@ -351,8 +349,6 @@ void WidevineCdmComponentInstallerTraits::UpdateCdmAdapter(
     const base::Version& cdm_version,
     const base::FilePath& cdm_install_dir,
     std::unique_ptr<base::DictionaryValue> manifest) {
-  LOG(WARNING) << __FUNCTION__;
-
   const base::FilePath adapter_version_path =
       GetPlatformDirectory(cdm_install_dir).AppendASCII(kCdmAdapterVersionName);
   const base::FilePath adapter_install_path =