Adjust virtual keyboard size base on input method candidates.

chrome/browser/resources/keyboard/main.js

Index: chrome/browser/resources/keyboard/main.js
diff --git a/chrome/browser/resources/keyboard/main.js b/chrome/browser/resources/keyboard/main.js
index cf3f97a93505f5f8e95c1037f793d0255ff41f03..b440935f313e8517502df8faa6eb5a8c33b1a00a 100644
--- a/chrome/browser/resources/keyboard/main.js
+++ b/chrome/browser/resources/keyboard/main.js
@@ -578,7 +578,7 @@ var allRows = [];  // Populated during start()
  */
 function getRowHeight() {
   var x = window.innerWidth;
-  var y = window.innerHeight - (imeui ? IME_HEIGHT - 2 : 0);
+  var y = window.innerHeight - ((imeui && imeui.visible) ? IME_HEIGHT : 0);
   return (x > kKeyboardAspect * y) ?
       (height = Math.floor(y / 4)) :
       (height = Math.floor(x / (kKeyboardAspect * 4)));
@@ -647,6 +647,8 @@ function sendKeyFunction(key) {
   }
 }
 
+var oldHeight = 0;
+var oldX = 0;
 /**
  * Resize the keyboard according to the new window size.
  * @return {void}
@@ -655,16 +657,23 @@ window.onresize = function() {
   var height = getRowHeight();
   var newX = document.documentElement.clientWidth;
 
-  // All rows should have the same aspect, so just use the first one
-  var totalWidth = Math.floor(height * allRows[0].aspect);
-  var leftPadding = Math.floor((newX - totalWidth) / 2);
-  document.getElementById('b').style.paddingLeft = leftPadding + 'px';
+  if (newX != oldX || height != oldHeight) {
+    // All rows should have the same aspect, so just use the first one
+    var totalWidth = Math.floor(height * allRows[0].aspect);
+    var leftPadding = Math.floor((newX - totalWidth) / 2);
+    document.getElementById('b').style.paddingLeft = leftPadding + 'px';
+  }
 
-  for (var i = 0; i < allRows.length; ++i) {
-    allRows[i].resize(height);
+  if (height != oldHeight) {
+    for (var i = 0; i < allRows.length; ++i) {
+      allRows[i].resize(height);
+    }
   }
 
   updateIme();
+
+  oldHeight = height;
+  oldX = newX;
 }
 
 /**
@@ -680,10 +689,12 @@ window.onload = function() {
     allRows.push(new Row(i, KEYS[i]));
   }
 
+  height = getRowHeight();
   for (var i = 0; i < allRows.length; ++i) {
-    body.appendChild(allRows[i].makeDOM(getRowHeight()));
+    body.appendChild(allRows[i].makeDOM(height));
     allRows[i].showMode(KEY_MODE);
   }
+  oldHeight = height;
 
   window.onresize();
 }