BrowserPluginHostTest: Rewrite 3 focus related tests and 1 visibility test to browser_tests.

chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js

Index: chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js b/chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js
index 5455099034973fae6da2626ecd258f2691e9d3b1..323c8a095502257c86a6217b3e7e5dee37f7f73a 100644
--- a/chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js
+++ b/chrome/test/data/extensions/platform_apps/web_view/focus/inject_focus.js
@@ -3,22 +3,67 @@
 // found in the LICENSE file.
 
 var embedder = null;
+var inputElement;
+var waitingForBlur = false;
+var seenBlurAfterFocus = false;
+
+var LOG = function(msg) {
+  window.console.log(msg);
+};
+
+var sendMessage = function(data) {
+  embedder.postMessage(JSON.stringify(data), '*');
+};
+
+var waitForBlurAfterFocus = function() {
+  LOG('seenBlurAfterFocus: ' + seenBlurAfterFocus);
+  if (seenBlurAfterFocus) {
+    // Already seen it.
+    sendMessage(['response-seenBlurAfterFocus']);
+    return;
+  }
+
+  // Otherwise we will wait.
+  waitingForBlur = true;
+};
+
+var waitForFocus = function() {
+  inputElement = document.createElement('input');
+  inputElement.addEventListener('focus', function(e) {
+    LOG('input.focus');
+    sendMessage(['response-seenFocus']);
+
+    inputElement.addEventListener('blur', function(e) {
+      seenBlurAfterFocus = true;
+      if (waitingForBlur) {
+        sendMessage(['response-seenBlurAfterFocus']);
+      }
+    });
+  });
+  document.body.appendChild(inputElement);
+
+  inputElement.focus();
+};
+
 window.addEventListener('message', function(e) {
   var data = JSON.parse(e.data);
   if (data[0] == 'connect') {
     embedder = e.source;
-    var msg = ['connected'];
-    embedder.postMessage(JSON.stringify(msg), '*');
-    return;
+    sendMessage(['connected']);
+  } else if (data[0] == 'request-hasFocus') {
+    var hasFocus = document.hasFocus();
+    sendMessage(['response-hasFocus', hasFocus]);
+  } else if (data[0] == 'request-waitForFocus') {
+    waitForFocus();
+  } else if (data[0] == 'request-waitForBlurAfterFocus') {
+    waitForBlurAfterFocus();
   }
 });
 
 window.addEventListener('focus', function(e) {
-  var msg = ['focused'];
-  embedder.postMessage(JSON.stringify(msg), '*');
+  sendMessage(['focused']);
 });
 
 window.addEventListener('blur', function(e) {
-  var msg = ['blurred'];
-  embedder.postMessage(JSON.stringify(msg), '*');
+  sendMessage(['blurred']);
 });