Switched variable naming style from camelCase to hacker_style in BrowserCommandsTests(browser_command_unittests).

This is a followup CL to https://codereview.chromium.org/678343002/.
BUG=none

Review URL: https://codereview.chromium.org/960423004

Cr-Commit-Position: refs/heads/master@{#318470}
diff --git a/chrome/browser/browser_commands_unittest.cc b/chrome/browser/browser_commands_unittest.cc
index d57799a..4a4767a 100644
--- a/chrome/browser/browser_commands_unittest.cc
+++ b/chrome/browser/browser_commands_unittest.cc
@@ -239,11 +239,11 @@
 
   GURL url("http://www.google.com");
   AddTab(browser(), url);
-  WebContents* firstTab = tab_strip_model->GetWebContentsAt(0);
+  WebContents* first_tab = tab_strip_model->GetWebContentsAt(0);
 
   // Continue to zoom in until zoom percent reaches 500.
   for (int i = 0; i < 9; ++i) {
-    ui_zoom::PageZoom::Zoom(firstTab, content::PAGE_ZOOM_IN);
+    ui_zoom::PageZoom::Zoom(first_tab, content::PAGE_ZOOM_IN);
   }
 
   // TODO([email protected]): Figure out why Zoom-In menu item is not
@@ -252,7 +252,7 @@
   if (chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS))
     chrome::UpdateCommandEnabled(browser(), IDC_ZOOM_PLUS, false);
 
-  ZoomController* zoom_controller = ZoomController::FromWebContents(firstTab);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(first_tab);
   EXPECT_FLOAT_EQ(500.0f, zoom_controller->GetZoomPercent());
   EXPECT_FALSE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
@@ -264,14 +264,14 @@
 
   GURL url("http://www.google.com");
   AddTab(browser(), url);
-  WebContents* firstTab = tab_strip_model->GetWebContentsAt(0);
+  WebContents* first_tab = tab_strip_model->GetWebContentsAt(0);
 
   // Continue to zoom out until zoom percent reaches 25.
   for (int i = 0; i < 7; ++i) {
-    ui_zoom::PageZoom::Zoom(firstTab, content::PAGE_ZOOM_OUT);
+    ui_zoom::PageZoom::Zoom(first_tab, content::PAGE_ZOOM_OUT);
   }
 
-  ZoomController* zoom_controller = ZoomController::FromWebContents(firstTab);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(first_tab);
   EXPECT_FLOAT_EQ(25.0f, zoom_controller->GetZoomPercent());
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
@@ -283,12 +283,12 @@
 
   GURL url("http://www.google.com");
   AddTab(browser(), url);
-  WebContents* firstTab = tab_strip_model->GetWebContentsAt(0);
+  WebContents* first_tab = tab_strip_model->GetWebContentsAt(0);
 
   // Change the zoom percentage to 100.
-  ui_zoom::PageZoom::Zoom(firstTab, content::PAGE_ZOOM_RESET);
+  ui_zoom::PageZoom::Zoom(first_tab, content::PAGE_ZOOM_RESET);
 
-  ZoomController* zoom_controller = ZoomController::FromWebContents(firstTab);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(first_tab);
   EXPECT_FLOAT_EQ(100.0f, zoom_controller->GetZoomPercent());
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_FALSE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
@@ -300,13 +300,13 @@
 
   GURL url("http://www.google.com");
   AddTab(browser(), url);
-  WebContents* firstTab = tab_strip_model->GetWebContentsAt(0);
+  WebContents* first_tab = tab_strip_model->GetWebContentsAt(0);
 
   // Changing zoom percentage from default should enable all the zoom
   // NSMenuItems.
-  ui_zoom::PageZoom::Zoom(firstTab, content::PAGE_ZOOM_IN);
+  ui_zoom::PageZoom::Zoom(first_tab, content::PAGE_ZOOM_IN);
 
-  ZoomController* zoom_controller = ZoomController::FromWebContents(firstTab);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(first_tab);
   EXPECT_FLOAT_EQ(110.0f, zoom_controller->GetZoomPercent());
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
@@ -322,22 +322,22 @@
   // Add First tab.
   AddTab(browser(), url);
   AddTab(browser(), url1);
-  WebContents* firstTab = tab_strip_model->GetWebContentsAt(0);
+  WebContents* first_tab = tab_strip_model->GetWebContentsAt(0);
 
-  ZoomController* zoom_controller = ZoomController::FromWebContents(firstTab);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(first_tab);
   EXPECT_FLOAT_EQ(100.0f, zoom_controller->GetZoomPercent());
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_FALSE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_MINUS));
 
   // Add Second tab.
-  WebContents* secondTab = tab_strip_model->GetWebContentsAt(1);
+  WebContents* second_tab = tab_strip_model->GetWebContentsAt(1);
 
   tab_strip_model->ActivateTabAt(1, true);
   EXPECT_TRUE(tab_strip_model->IsTabSelected(1));
-  ui_zoom::PageZoom::Zoom(secondTab, content::PAGE_ZOOM_OUT);
+  ui_zoom::PageZoom::Zoom(second_tab, content::PAGE_ZOOM_OUT);
 
-  zoom_controller = ZoomController::FromWebContents(secondTab);
+  zoom_controller = ZoomController::FromWebContents(second_tab);
   EXPECT_FLOAT_EQ(90.0f, zoom_controller->GetZoomPercent());
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_PLUS));
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_NORMAL));
@@ -348,8 +348,8 @@
   TabStripModel* tab_strip_model = browser()->tab_strip_model();
   GURL url("http://code.google.com");
   AddTab(browser(), url);
-  WebContents* currentTab = tab_strip_model->GetWebContentsAt(0);
-  ZoomController* zoom_controller = ZoomController::FromWebContents(currentTab);
+  WebContents* tab = tab_strip_model->GetWebContentsAt(0);
+  ZoomController* zoom_controller = ZoomController::FromWebContents(tab);
 
   // Set the default zoom level to 125.
   profile()->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(
@@ -362,7 +362,7 @@
   EXPECT_TRUE(chrome::IsCommandEnabled(browser(), IDC_ZOOM_MINUS));
 
   // Change the zoom level.
-  ui_zoom::PageZoom::Zoom(currentTab, content::PAGE_ZOOM_IN);
+  ui_zoom::PageZoom::Zoom(tab, content::PAGE_ZOOM_IN);
 
   EXPECT_FLOAT_EQ(150.0f, zoom_controller->GetZoomPercent());