DevTools: simplify http handler delegate as it is moving into content.

chrome/browser/devtools/device/adb/mock_adb_server.cc

Index: chrome/browser/devtools/device/adb/mock_adb_server.cc
diff --git a/chrome/browser/devtools/device/adb/mock_adb_server.cc b/chrome/browser/devtools/device/adb/mock_adb_server.cc
index fe35d99cee5fad750fdfb42f7a4a03030aa48080..a86452e80c8f988ddca370b41b58ce7eb060619d 100644
--- a/chrome/browser/devtools/device/adb/mock_adb_server.cc
+++ b/chrome/browser/devtools/device/adb/mock_adb_server.cc
@@ -154,7 +154,6 @@ char kSampleWebViewPages[] = "[ {\n"
     "/devtools/page/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
     "   \"faviconUrl\": \"http://chromium.org/favicon.ico\",\n"
     "   \"id\": \"3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
-    "   \"thumbnailUrl\": \"/thumb/3E962D4D-B676-182D-3BE8-FAE7CE224DE7\",\n"
     "   \"title\": \"Blink - The Chromium Projects\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"http://www.chromium.org/blink\",\n"
@@ -168,7 +167,6 @@ char kSampleWebViewPages[] = "[ {\n"
     "/devtools/page/44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
     "   \"faviconUrl\": \"\",\n"
     "   \"id\": \"44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
-    "   \"thumbnailUrl\": \"/thumb/44681551-ADFD-2411-076B-3AB14C1C60E2\",\n"
     "   \"title\": \"More Activity\",\n"
     "   \"type\": \"page\",\n"
     "   \"url\": \"about:blank\",\n"