Add chrome.webstore API methods to allow sites to see progress of installation

chrome/common/extensions/chrome_extension_messages.h

Index: chrome/common/extensions/chrome_extension_messages.h
diff --git a/chrome/common/extensions/chrome_extension_messages.h b/chrome/common/extensions/chrome_extension_messages.h
index e25e9010f97ddd7dda89bc20f35ccd1ef12913be..237241229e1976633b24c5a73f4b8b7d428adc58 100644
--- a/chrome/common/extensions/chrome_extension_messages.h
+++ b/chrome/common/extensions/chrome_extension_messages.h
@@ -8,11 +8,15 @@
 //
 // Multiply-included message file, hence no include guard.
 
+#include "chrome/common/extensions/api/webstore/webstore_api_constants.h"
 #include "chrome/common/web_application_info.h"
 #include "ipc/ipc_message_macros.h"
 
 #define IPC_MESSAGE_START ChromeExtensionMsgStart
 
+IPC_ENUM_TRAITS_MAX_VALUE(extensions::api::webstore::InstallStage,
+                          extensions::api::webstore::INSTALL_STAGE_INSTALLING)
+
 IPC_STRUCT_TRAITS_BEGIN(WebApplicationInfo::IconInfo)
   IPC_STRUCT_TRAITS_MEMBER(url)
   IPC_STRUCT_TRAITS_MEMBER(width)
@@ -34,6 +38,31 @@ IPC_STRUCT_TRAITS_END()
 IPC_MESSAGE_ROUTED1(ChromeExtensionMsg_GetApplicationInfo,
                     int32 /* page_id */)
 
+// Sent by the renderer to implement chrome.webstore.install().
+IPC_MESSAGE_ROUTED5(ExtensionHostMsg_InlineWebstoreInstall,
+                    int32 /* install id */,
+                    int32 /* return route id */,
+                    std::string /* Web Store item ID */,

[jln (very slow on Chromium), 2014/03/25 02:18:00]

Is there any way we could type this properly rather than use a string?

[Devlin, 2014/03/25 17:31:59]

Probably not. "Web Store item ID" is a fancy way of saying "extension id", which
is just a unique string.  But we can do some checking on it (e.g., IsIdValid(),
etc) that should hopefully help.

+                    GURL /* requestor URL */,
+                    int /* listeners_mask */)
+
+// Sent to the renderer if install stage updates were requested for an inline
+// install.
+IPC_MESSAGE_ROUTED1(ExtensionMsg_InlineInstallStageChanged,
+                    extensions::api::webstore::InstallStage /* stage */)
+
+// Sent to the renderer if download progress updates were requested for an
+// inline install.
+IPC_MESSAGE_ROUTED1(ExtensionMsg_InlineInstallDownloadProgress,
+                    int /* percent_downloaded */)
+
+// Send to renderer once the installation mentioned on
+// ExtensionHostMsg_InlineWebstoreInstall is complete.
+IPC_MESSAGE_ROUTED3(ExtensionMsg_InlineWebstoreInstallResponse,
+                    int32 /* install id */,
+                    bool /* whether the install was successful */,
+                    std::string /* error */)

[jln (very slow on Chromium), 2014/03/25 02:18:00]

Any way this could be an error message index instead of a string?
(Non-blocking since old)

[Devlin, 2014/03/25 17:31:59]

Not sure I follow on "error message index"?

+
 // Messages sent from the renderer to the browser.
 
 IPC_MESSAGE_ROUTED2(ChromeExtensionHostMsg_DidGetApplicationInfo,