Propagate pageScaleFactor to GuestViews

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index cec3302570ae4f85a27ab8a6b11d51b1bf8816ee..a0cbf0911ba295beb4cf1a0013656f78248f3ee5 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -681,8 +681,12 @@ IPC_MESSAGE_ROUTED2(ViewMsg_PluginActionAt,
                     gfx::Point, /* location */
                     blink::WebPluginAction)
 
-// Resets the page scale for the current main frame to the default page scale.
-IPC_MESSAGE_ROUTED0(ViewMsg_ResetPageScale)
+// Tell the renderer to send a ViewHostMsg_PageScaleFactorChanged with its
+// current page scale factor.
+IPC_MESSAGE_ROUTED0(ViewMsg_GetPageScale)
+
+// Sets the page scale for the current main frame to the given page scale.
+IPC_MESSAGE_ROUTED1(ViewMsg_SetPageScale, float /* page_scale_factor */)
 
 // Change the zoom level for the current main frame.  If the level actually
 // changes, a ViewHostMsg_DidZoomURL message will be sent back to the browser
@@ -1234,9 +1238,9 @@ IPC_MESSAGE_ROUTED2(ViewHostMsg_DidZoomURL,
                     double /* zoom_level */,
                     GURL /* url */)
 
-// Sent when the renderer changes its page scale factor and whether or not the
-// page scale factor is one changes.
-IPC_MESSAGE_ROUTED1(ViewHostMsg_PageScaleFactorIsOneChanged, bool /* is_one */)
+// Sent when the renderer changes its page scale factor.
+IPC_MESSAGE_ROUTED1(ViewHostMsg_PageScaleFactorChanged,
+                    float /* page_scale_factor */)
 
 // Updates the minimum/maximum allowed zoom percent for this tab from the
 // default values.  If |remember| is true, then the zoom setting is applied to