Fix some memory leaks in AuraLinux tests

These are typically caused by ATK GObjects that are reffed, but then
never unreffed.

Bug: 961578
Change-Id: I6455044685f7253b6088ddaf32e611eaa97971f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1605402Reviewed-by: Joanmarie Diggs <jdiggs@igalia.com>
Commit-Queue: Martin Robinson <mrobinson@igalia.com>
Cr-Commit-Position: refs/heads/master@{#658483}

content/browser/accessibility/accessibility_auralinux_browsertest.cc

@@ -193,6 +193,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
   CheckTextAtOffset(atk_text, 0, ATK_TEXT_BOUNDARY_LINE_START, 0,
                     InputContentsString().size(),
                     InputContentsString().c_str());
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
@@ -209,6 +211,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
   // Last line does not have a trailing newline.
   CheckTextAtOffset(atk_text, 32, ATK_TEXT_BOUNDARY_LINE_START, 32,
                     InputContentsString().size(), "\"KHTML, like\".");
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
@@ -236,6 +240,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
         n_characters,
         "cooperation between intelligent rational decision-makers.\"");
   }
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
@@ -328,6 +334,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
   EXPECT_EQ(0, y);
   EXPECT_EQ(0, width);
   EXPECT_EQ(0, height);
+
+  g_object_unref(atk_text);
 }
 
 AtkCoordType kCoordinateTypes[] = {
@@ -430,6 +438,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
       EXPECT_EQ(combined_extents.height(), atk_rect.height);
     }
   }
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
@@ -509,6 +519,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest,
       EXPECT_EQ(previous_height, height);
     }
   }
+
+  g_object_unref(atk_text);
 }
 
 #if defined(ATK_230)
@@ -575,6 +587,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest, TestScrollToPoint) {
   atk_component_get_extents(ATK_COMPONENT(frame), nullptr, &frame_y, nullptr,
                             nullptr, ATK_XY_SCREEN);
   EXPECT_EQ(frame_y, y);
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest, TestScrollTo) {
@@ -714,6 +728,8 @@ IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest, TestSetSelection) {
   EXPECT_EQ(1, start_offset);
   EXPECT_EQ(contents_string_length, end_offset);
   g_free(selected_text);
+
+  g_object_unref(atk_text);
 }
 
 IN_PROC_BROWSER_TEST_F(AccessibilityAuraLinuxBrowserTest, TestAtkTextListItem) {

ui/accessibility/platform/ax_platform_node_auralinux_unittest.cc

@@ -1499,9 +1499,10 @@ TEST_F(AXPlatformNodeAuraLinuxTest, TestFocusTriggersAtkWindowActive) {
 
   AtkObject* root_atk_object(GetRootAtkObject());
   EXPECT_TRUE(ATK_IS_OBJECT(root_atk_object));
-  g_object_ref(root_atk_object);
   EXPECT_TRUE(ATK_IS_WINDOW(root_atk_object));
 
+  g_object_ref(root_atk_object);
+
   AXNode* child_node = GetRootNode()->children()[0];
 
   // A focus event on a child node should not cause the window to
@@ -1761,17 +1762,14 @@ TEST_F(AXPlatformNodeAuraLinuxTest, TestAtkObjectSetSizePosInSet) {
   AXNode* radiobutton1 = GetRootNode()->children()[0];
   AtkObject* radiobutton1_atk_object(AtkObjectFromNode(radiobutton1));
   EXPECT_TRUE(ATK_IS_OBJECT(radiobutton1_atk_object));
-  g_object_ref(radiobutton1_atk_object);
 
   AXNode* radiobutton2 = GetRootNode()->children()[1];
   AtkObject* radiobutton2_atk_object(AtkObjectFromNode(radiobutton2));
   EXPECT_TRUE(ATK_IS_OBJECT(radiobutton2_atk_object));
-  g_object_ref(radiobutton2_atk_object);
 
   AXNode* radiobutton3 = GetRootNode()->children()[2];
   AtkObject* radiobutton3_atk_object(AtkObjectFromNode(radiobutton3));
   EXPECT_TRUE(ATK_IS_OBJECT(radiobutton3_atk_object));
-  g_object_ref(radiobutton3_atk_object);
 
   // Notice that setsize was never assigned to any of the kRadioButtons, but was
   // inferred.