Define WebTextInputMode as a enum in the public API.

third_party/WebKit/public/platform/WebTextInputInfo.h

Index: third_party/WebKit/public/platform/WebTextInputInfo.h
diff --git a/third_party/WebKit/public/platform/WebTextInputInfo.h b/third_party/WebKit/public/platform/WebTextInputInfo.h
index 61f8ecc25cc994490440849f3fbbec68b2aef457..a950e4a9dcf4e9f76c3dabf3ffe72c4f4e5faad5 100644
--- a/third_party/WebKit/public/platform/WebTextInputInfo.h
+++ b/third_party/WebKit/public/platform/WebTextInputInfo.h
@@ -28,6 +28,7 @@
 
 #include "WebCommon.h"
 #include "WebString.h"
+#include "WebTextInputMode.h"
 #include "WebTextInputType.h"
 
 namespace blink {
@@ -54,8 +55,7 @@ struct WebTextInputInfo {
   int compositionEnd;
 
   // The inputmode attribute value of the currently focused input field.
-  // This string is lower-case.
-  WebString inputMode;
+  WebTextInputMode inputMode;
 
   BLINK_PLATFORM_EXPORT bool equals(const WebTextInputInfo&) const;
 
@@ -65,7 +65,8 @@ struct WebTextInputInfo {
         selectionStart(0),
         selectionEnd(0),
         compositionStart(-1),
-        compositionEnd(-1) {}
+        compositionEnd(-1),
+        inputMode(kWebTextInputModeDefault) {}
 };
 
 inline bool operator==(const WebTextInputInfo& a, const WebTextInputInfo& b) {