Decouple BrowserPlugin from RenderView
With the move to out-of-process iframes, RenderFrames and away from RenderViews, this CL removes routing via RenderView Routing ID from BrowserPlugin.
Aside from BrowserPluginHostMsg_Attach, which creates a new BrowserPluginEmbedder in the associated WebContents on first call, all other IPCs are now CONTROL because they do not rely on routing IDs.
BUG=436339, 330264
TBR=kenrb@chromium.org for mechanical change to make all BrowserPluginHostMsg IPCs except ATTACH CONTROL instead of ROUTED.
Review URL: https://codereview.chromium.org/929243003
Cr-Commit-Position: refs/heads/master@{#317940}
11 files changed
