Send autocapitalize flags to the Android virtual keyboard based on Blink hints.

This changes the behaviour of AdapterInputConnection to pass a
InputType.TYPE_TEXT_FLAG_CAP_* based on the
WebTextInputFlags.Autocapitalize* instead of doing it purely based on the
element's type.

This CL requires the following Blink CL:
https://codereview.chromium.org/995363002

BUG=466930

Review URL: https://codereview.chromium.org/1003143002

Cr-Commit-Position: refs/heads/master@{#322414}

content/public/android/java/src/org/chromium/content/browser/input/AdapterInputConnection.java

@@ -83,9 +83,7 @@ public class AdapterInputConnection extends BaseInputConnection {
             }
         } else if (inputType == TextInputType.TEXT_AREA
                 || inputType == TextInputType.CONTENT_EDITABLE) {
-            // TextArea or contenteditable.
-            outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE
-                    | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
+            outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
             if ((inputFlags & WebTextInputFlags.AutocorrectOff) == 0) {
                 outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT;
             }
@@ -122,6 +120,23 @@ public class AdapterInputConnection extends BaseInputConnection {
                     | InputType.TYPE_NUMBER_FLAG_DECIMAL;
             outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
         }
+
+        // Handling of autocapitalize. Blink will send the flag taking into account the element's
+        // type. This is not using AutocapitalizeNone because Android does not autocapitalize by
+        // default and there is no way to express no capitalization.
+        // Autocapitalize is meant as a hint to the virtual keyboard.
+        if ((inputFlags & WebTextInputFlags.AutocapitalizeCharacters) != 0) {
+            outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS;
+        } else if ((inputFlags & WebTextInputFlags.AutocapitalizeWords) != 0) {
+            outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_WORDS;
+        } else if ((inputFlags & WebTextInputFlags.AutocapitalizeSentences) != 0) {
+            outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_SENTENCES;
+        }
+        // Content editable doesn't use autocapitalize so we need to set it manually.
+        if (inputType == TextInputType.CONTENT_EDITABLE) {
+            outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_SENTENCES;
+        }
+
         outAttrs.initialSelStart = Selection.getSelectionStart(mEditable);
         outAttrs.initialSelEnd = Selection.getSelectionEnd(mEditable);
         mLastUpdateSelectionStart = outAttrs.initialSelStart;