Implement the Windows desktop search redirection feature.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 45c6a8476e7a6990785160f898c1abb43816982d..48e822a68b1ff73cb686236cd306410ac6bc8a97 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -43548,6 +43548,24 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Search.WindowsDesktopSearch.InfobarAction"
+    enum="WindowsDesktopSearchInfobarAction">
+  <owner>fdoray@chromium.org</owner>
+  <summary>
+    The action performed by the user in the infobar explaining that a Windows
+    desktop search has been redirected to the default search engine.
+  </summary>
+</histogram>
+
+<histogram name="Search.WindowsDesktopSearch.URLAction"
+    enum="WindowsDesktopSearchURLAction">
+  <owner>fdoray@chromium.org</owner>
+  <summary>
+    The action performed when a Windows desktop search URL is passed to the
+    browser through the command line.
+  </summary>
+</histogram>
+
 <histogram name="SequencedWorkerPool.ShutdownDelayTime" units="ms">
   <owner>gab@chromium.org</owner>
   <summary>
@@ -67581,6 +67599,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="57" label="READER_MODE_INFOBAR_DELEGATE"/>
   <int value="58" label="SYNC_ERROR_INFOBAR_DELEGATE"/>
   <int value="59" label="UPGRADE_INFOBAR_DELEGATE"/>
+  <int value="60" label="WINDOWS_DESKTOP_SEARCH_INFOBAR_DELEGATE"/>
 </enum>
 
 <enum name="InfoBarResponse" type="int">
@@ -80693,6 +80712,20 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="Desktop Aura"/>
 </enum>
 
+<enum name="WindowsDesktopSearchInfobarAction" type="int">
+  <int value="0" label="Clicked the 'Manage search settings' link"/>
+  <int value="1" label="Clicked the dismiss button"/>
+  <int value="2" label="InfoBar dismissed implicitly (no interaction)"/>
+</enum>
+
+<enum name="WindowsDesktopSearchURLAction" type="int">
+  <int value="0" label="No redirection - Feature disabled"/>
+  <int value="1" label="No redirection - Default search engine is Bing"/>
+  <int value="2" label="No redirection - Default search engine is invalid"/>
+  <int value="3" label="Redirection - Infobar shown"/>
+  <int value="4" label="Redirection - No infobar"/>
+</enum>
+
 <enum name="WindowsExitCode" type="int">
   <int value="-2147483645" label="0x80000003 - STATUS_BREAKPOINT"/>
   <int value="-1073741819" label="0xC0000005 - STATUS_ACCESS_VIOLATION"/>