Fix search-by-image regression.

chrome/browser/search_engines/prepopulated_engines.json

Index: chrome/browser/search_engines/prepopulated_engines.json
diff --git a/chrome/browser/search_engines/prepopulated_engines.json b/chrome/browser/search_engines/prepopulated_engines.json
index c0fce8b97d23ffb65769507a4626b6a9e3431fef..a3d199a95efca2ce1accc2729ded9f0fbb7420fe 100644
--- a/chrome/browser/search_engines/prepopulated_engines.json
+++ b/chrome/browser/search_engines/prepopulated_engines.json
@@ -26,7 +26,7 @@
 
     // Increment this if you change the data in ways that mean users with
     // existing data should get a new version.
-    "kCurrentDataVersion": 60
+    "kCurrentDataVersion": 61
   },
 
   // The following engines are included in country lists and are added to the
@@ -490,7 +490,7 @@
       "suggest_url": "{google:baseSuggestURL}search?{google:searchFieldtrialParameter}client={google:suggestClient}&q={searchTerms}&{google:cursorPosition}{google:zeroPrefixUrl}{google:pageClassification}sugkey={google:suggestAPIKeyParameter}",
       "instant_url": "{google:baseURL}webhp?sourceid=chrome-instant&{google:RLZ}{google:instantEnabledParameter}{google:instantExtendedEnabledParameter}{google:ntpIsThemedParameter}{google:omniboxStartMarginParameter}ie={inputEncoding}",
       "image_url": "{google:baseURL}searchbyimage/upload",
-      "image_url_post_params": "image_content={google:imageThumbnail},image_url={google:imageURL},sbisrc={google:imageSearchSource}",
+      "image_url_post_params": "encoded_image={google:imageThumbnail},image_url={google:imageURL},sbisrc={google:imageSearchSource}",
       "alternate_urls": [
         "{google:baseURL}#q={searchTerms}",
         "{google:baseURL}search#q={searchTerms}",