Revert of Devtools Console: Tab to autocomplete and enter to execute command (patchset #2 id:40001 of https://codereview.chromium.org/1608673002/ )

Reason for revert:
This patch breaks suggest box in Sources panel. As the patch is subject to merge, I revert this for now so that you would be able to merge a single patch.

Original issue's description:
> Devtools Console: Tab to autocomplete and enter to execute command
>
> BUG=578901
>
> Committed: https://crrev.com/72c13ed8293f8bd61ecb91a4ccc23a975da30fb2
> Cr-Commit-Position: refs/heads/master@{#370302}

TBR=paulirish@chromium.org,pfeldman@chromium.org,samli@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=578901

Review URL: https://codereview.chromium.org/1614473002

Cr-Commit-Position: refs/heads/master@{#370499}

3 files changed, 7 insertions, 4 deletions

diff --git a/third_party/WebKit/LayoutTests/inspector/sources/autocomplete-general.html b/third_party/WebKit/LayoutTests/inspector/sources/autocomplete-general.html
index 1f88e31..5113ef2 100644
--- a/third_party/WebKit/LayoutTests/inspector/sources/autocomplete-general.html
+++ b/third_party/WebKit/LayoutTests/inspector/sources/autocomplete-general.html
@@ -32,7 +32,7 @@ function test()
             InspectorTest.typeIn(textEditor, "m");
             function onAutocompletionSuggestBox()
             {
-                document.activeElement.dispatchEvent(InspectorTest.createKeyEvent("U+0009"));
+                document.activeElement.dispatchEvent(InspectorTest.createKeyEvent("Enter"));
                 dumpDictionary(next);
             }
         },
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/SuggestBox.js b/third_party/WebKit/Source/devtools/front_end/ui/SuggestBox.js
index f4c16c9..a6e2903 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/SuggestBox.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/SuggestBox.js
@@ -398,8 +398,8 @@ WebInspector.SuggestBox.prototype = {
             return this.pageUpKeyPressed();
         case "PageDown":
             return this.pageDownKeyPressed();
-        case "U+0009": // Tab
-            return this.tabKeyPressed();
+        case "Enter":
+            return this.enterKeyPressed();
         }
         return false;
     },
@@ -441,7 +441,7 @@ WebInspector.SuggestBox.prototype = {
     /**
      * @return {boolean}
      */
-    tabKeyPressed: function()
+    enterKeyPressed: function()
     {
         var hasSelectedItem = !!this._selectedElement;
         this.acceptSuggestion();
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
index 06bdb2a..f882cfd 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
@@ -285,6 +285,9 @@ WebInspector.TextPrompt.prototype = {
         delete this._needUpdateAutocomplete;
 
         switch (event.keyIdentifier) {
+        case "U+0009": // Tab
+            handled = this.tabKeyPressed(event);
+            break;
         case "Left":
         case "Home":
             this._removeSuggestionAids();