[Garbled Text][Infobar] Adding infobar to suggest turning on encoding detection.

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 4b4241d116fec3ff8ee75e5a5394b8f93ff8db37..7cd5f7b9b09862faf1e08cb27dcd3a252ff8708d 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -338,6 +338,13 @@ IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetClientSidePhishingDetection,
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_StartFrameSniffer,
                     string16 /* frame-name */)
 
+// Reload frame fully using cache.
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_ReloadFromCache)
+
+// Reload frame fully using cache.
+IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetGarbledTextDetectionEnableState,
+                    bool /* enabled */)
+
 // JavaScript related messages -----------------------------------------------
 
 // Notify the JavaScript engine in the render to change its parameters
@@ -631,3 +638,8 @@ IPC_SYNC_MESSAGE_ROUTED2_1(ChromeViewHostMsg_GetCookies,
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)
+
+// This message indicate character encoding mismatch.  The browser process
+// should suggest the user to enable auto encoding detection.
+IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_GarbledTextDetected,
+                    std::vector<GURL> /* garbled_url */)