[ios] Plumb Browser to VoiceSearchController

VoiceSearchCoordinator needs a Browser to access a Browser-scoped
FullscreenController.

Bug: 790886
Change-Id: I24acae364cb64ecc011375045feab66e58dd432e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132852
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756754}

ios/chrome/browser/ui/browser_view/browser_view_controller.mm

@@ -2704,7 +2704,7 @@ NSString* const kBrowserViewControllerSnackbarCategory =
         ios::GetChromeBrowserProvider()->GetVoiceSearchProvider();
     if (provider) {
       _voiceSearchController =
-          provider->CreateVoiceSearchController(self.browserState);
+          provider->CreateVoiceSearchController(self.browser);
       if (self.primaryToolbarCoordinator) {
         _voiceSearchController->SetDispatcher(
             static_cast<id<LoadQueryCommands>>(self.commandDispatcher));

ios/public/provider/chrome/browser/voice/voice_search_provider.h

@@ -13,7 +13,7 @@
 
 @protocol ApplicationCommands;
 class AudioSessionController;
-class ChromeBrowserState;
+class Browser;
 class VoiceSearchController;
 
 // VoiceSearchProvider allows embedders to provide functionality related to
@@ -35,7 +35,7 @@ class VoiceSearchProvider {
 
   // Creates a new VoiceSearchController object.
   virtual scoped_refptr<VoiceSearchController> CreateVoiceSearchController(
-      ChromeBrowserState* browser_state) const;
+      Browser* browser) const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VoiceSearchProvider);

ios/public/provider/chrome/browser/voice/voice_search_provider.mm

@@ -23,7 +23,6 @@ AudioSessionController* VoiceSearchProvider::GetAudioSessionController() const {
 }
 
 scoped_refptr<VoiceSearchController>
-VoiceSearchProvider::CreateVoiceSearchController(
-    ChromeBrowserState* browser_state) const {
+VoiceSearchProvider::CreateVoiceSearchController(Browser* browser) const {
   return scoped_refptr<VoiceSearchController>(nullptr);
 }