DevTools: Don't show autocomplete when the user is typing a number

Any time the user typed 3, we would show a suggestion for Float32Array.

BUG=660941

Review-Url: https://codereview.chromium.org/2479943002
Cr-Commit-Position: refs/heads/master@{#430157}

third_party/WebKit/LayoutTests/inspector/console/console-correct-suggestions-expected.txt

@@ -39,4 +39,12 @@ Found: NodeList
 Found: AudioNode
 Found: GainNode
 
+Checking '32'
+Not Found: Float32Array
+Not Found: Int32Array
+
+Checking 'window.32'
+Found: Float32Array
+Found: Int32Array
+
 

third_party/WebKit/LayoutTests/inspector/console/console-correct-suggestions.html

@@ -49,7 +49,9 @@ function test()
         () => testCompletions("templateString`asdf`", "should", ["shouldNotFindThis"]),
         () => testCompletions("window.document.", "BODY", ["body"]),
         () => testCompletions("window.", "dOcUmE", ["document"]),
-        () => testCompletions("window.", "node", ["NodeList", "AudioNode", "GainNode"])
+        () => testCompletions("window.", "node", ["NodeList", "AudioNode", "GainNode"]),
+        () => testCompletions("", "32", ["Float32Array", "Int32Array"]),
+        () => testCompletions("window.", "32", ["Float32Array", "Int32Array"])
     ]).then(InspectorTest.completeTest);
 
 }

third_party/WebKit/Source/devtools/front_end/components/JavaScriptAutocomplete.js

@@ -74,7 +74,7 @@ WebInspector.JavaScriptAutocomplete.completionsForExpression = function(expressi
     expressionString = expressionString.substr(0, lastIndex);
 
   // User is entering float value, do not suggest anything.
-  if (expressionString && !isNaN(expressionString))
+  if ((expressionString && !isNaN(expressionString)) || (!expressionString && query && !isNaN(query)))
     return Promise.resolve([]);
 
   if (!query && !expressionString && !force)